| Type: | Package |
| Title: | R Interface to C API of GLPK |
| Version: | 1.3.4.1 |
| Date: | 2022-11-10 |
| Depends: | R (≥ 2.6.0) |
| Imports: | methods |
| Description: | R Interface to C API of GLPK, depends on GLPK Version >= 4.42. |
| SystemRequirements: | GLPK (>= 4.42) |
| License: | GPL-3 | file LICENSE |
| LazyLoad: | yes |
| Collate: | generics.R glpk_ptrClass.R glpk.R glpkAPI.R zzz.R |
| Packaged: | 2025-07-10 16:11:58 UTC; hornik |
| NeedsCompilation: | yes |
| Repository: | CRAN |
| Date/Publication: | 2025-07-10 16:31:25 UTC |
| Author: | Mihail Anton [cre], Mayo Roettger [ctb], Gabriel Gelius-Dietrich [aut], Louis Luangkesorn [ctb] |
| Maintainer: | Mihail Anton <mihail.anton@chalmers.se> |
R Interface to C API of GLPK
Description
A low level interface to the GNU Linear Programming Kit (GLPK).
Details
The package glpkAPI provides access to the callable library
of the GNU Linear Programming Kit from within R.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Examples
# load package
library(glpkAPI)
# preparing the model
lp <- initProbGLPK()
# model data
nrows <- 5
ncols <- 8
# constraint matrix
ne <- 14
ia <- c(1, 5, 1, 2, 2, 3, 1, 4, 1, 5, 3, 4, 1, 5)
ja <- c(1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 8)
ar <- c(3.0, 5.6, 1.0, 2.0, 1.1, 1.0, -2.0, 2.8,
-1.0, 1.0, 1.0, -1.2, -1.0, 1.9)
# objective function
obj <- c(1, 0, 0, 0, 2, 0, 0, -1)
# upper and lower bounds of the rows
rlower <- c(2.5, -1000, 4, 1.8, 3)
rupper <- c(1000, 2.1, 4, 5, 15)
# upper and lower bounds of the columns
clower <- c(2.5, 0, 0, 0, 0.5, 0, 0, 0)
cupper <- c(1000, 4.1, 1, 1, 4, 1000, 1000, 4.3)
# direction of optimization
setObjDirGLPK(lp, GLP_MIN)
# add rows and columns
addRowsGLPK(lp, nrows)
addColsGLPK(lp, ncols)
setColsBndsObjCoefsGLPK(lp, c(1:ncols), clower, cupper, obj)
setRowsBndsGLPK(lp, c(1:nrows), rlower, rupper)
# load constraint matrix
loadMatrixGLPK(lp, ne, ia, ja, ar)
# solve lp problem
solveSimplexGLPK(lp)
# retrieve the results
getSolStatGLPK(lp)
getObjValGLPK(lp)
getColsPrimGLPK(lp)
# remove problem object
delProbGLPK(lp)
Add Columns to a GLPK Problem Object
Description
Low level interface function to the GLPK function glp_add_cols.
Consult the GLPK documentation for more detailed information.
Usage
addColsGLPK(lp, ncols)
Arguments
lp |
An object of class |
ncols |
The number of columns to add. |
Details
Interface to the C function addCols which calls the GLPK
function glp_add_cols.
Value
The ordinal number of the first new column added to the problem object is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html
Add Rows to a GLPK Problem Object
Description
Low level interface function to the GLPK function glp_add_rows.
Consult the GLPK documentation for more detailed information.
Usage
addRowsGLPK(lp, nrows)
Arguments
lp |
An object of class |
nrows |
The number of rows to add. |
Details
Interface to the C function addRows which calls the GLPK
function glp_add_rows.
Value
The ordinal number of the first new row added to the problem object is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html
Contruct Advanced Initial LP Basis
Description
Low level interface function to the GLPK function glp_adv_basis.
Consult the GLPK documentation for more detailed information.
Usage
advBasisGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function advBasis which calls the GLPK
function glp_adv_basis.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html
Check if the basis factorization exists
Description
Low level interface function to the GLPK function glp_bf_exists.
Consult the GLPK documentation for more detailed information.
Usage
bfExistsGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function bfExists which calls the GLPK
function glp_bf_exists.
Value
Returns non-zero if the basis factorization for the specified problem object exists. Otherwise the routine returns zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Check if the basis factorization has been updated
Description
Low level interface function to the GLPK function glp_bf_updated.
Consult the GLPK documentation for more detailed information.
Usage
bfUpdatedGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function bfUpdated which calls the GLPK
function glp_bf_updated.
Value
Returns non-zero if the basis factorization has been updated at least once. Otherwise the routine returns zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Check for Duplicate Elements in Sparse Matrix
Description
Low level interface function to the GLPK function glp_check_dup.
Consult the GLPK documentation for more detailed information.
Usage
checkDupGLPK(m, n, ne, ia, ja)
Arguments
m |
Number of rows in the matrix. |
n |
Number of columns in the matrix. |
ne |
Number of non-zero elements in the matrix. |
ia |
Row indices of the non-zero elements. |
ja |
Column indices of the non-zero elements. |
Details
Interface to the C function checkDup which calls the GLPK
function glp_check_dup.
Value
Returns one of the following values:
0 |
No duplikate elements. |
-k |
Indices |
+k |
Element |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html
Copy problem object content
Description
Low level interface function to the GLPK function glp_copy_prob.
Consult the GLPK documentation for more detailed information.
Usage
copyProbGLPK(lp, clp, name = GLP_OFF)
Arguments
lp |
An object of class |
clp |
A pointer to a GLPK problem object (destination). |
name |
If set to |
Details
Interface to the C function copyProb which calls the GLPK
function glp_copy_prob.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘enable/disable flag’.
Construct Bixby's initial LP basis
Description
Low level interface function to the GLPK function glp_cpx_basis.
Consult the GLPK documentation for more detailed information.
Usage
cpxBasisGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function cpxBasis which calls the GLPK
function glp_cpx_basis.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Create the Name Index
Description
Low level interface function to the GLPK function glp_create_index.
Consult the GLPK documentation for more detailed information.
Usage
createIndexGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function createIndex which calls the GLPK
function glp_create_index.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Delete Columns from Problem Object
Description
Low level interface function to the GLPK function glp_del_cols.
Consult the GLPK documentation for more detailed information.
Usage
delColsGLPK(lp, ncols, j)
Arguments
lp |
An object of class |
ncols |
Number of columns to delete. |
j |
Ordinal numbers of columns to delete. |
Details
Interface to the C function delCols which calls the GLPK
function glp_del_cols.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Delete Problem Object
Description
Low level interface function to the GLPK function glp_delete_prob.
Consult the GLPK documentation for more detailed information.
Usage
delProbGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function delProb which calls the GLPK
function glp_delete_prob.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Delete Rows from Problem Object
Description
Low level interface function to the GLPK function glp_del_rows.
Consult the GLPK documentation for more detailed information.
Usage
delRowsGLPK(lp, nrows, i)
Arguments
lp |
An object of class |
nrows |
Number of rows to delete. |
i |
Ordinal numbers of rows to delete. |
Details
Interface to the C function delRows which calls the GLPK
function glp_del_rows.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Delete the Name Index
Description
Low level interface function to the GLPK function glp_delete_index.
Consult the GLPK documentation for more detailed information.
Usage
deleteIndexGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function deleteIndex which calls the GLPK
function glp_delete_index.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Erase problem object content
Description
Low level interface function to the GLPK function glp_erase_prob.
Consult the GLPK documentation for more detailed information.
Usage
eraseProbGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function eraseProb which calls the GLPK
function glp_erase_prob.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Compute the basis factorization
Description
Low level interface function to the GLPK function glp_factorize.
Consult the GLPK documentation for more detailed information.
Usage
factorizeGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function factorize which calls the GLPK
function glp_factorize.
Value
Returns zero if the basis factorization has been successfully computed. Otherwise the routine returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘return codes’.
Find Column by its Name
Description
Low level interface function to the GLPK function glp_find_col.
Consult the GLPK documentation for more detailed information.
Usage
findColGLPK(lp, cname)
Arguments
lp |
An object of class |
cname |
A column name. |
Details
Interface to the C function findCol which calls the GLPK
function glp_find_column.
Value
Returns the ordinal number of a column, which is assigned the specified cname.
Note
Before calling findColGLPK for the first time on a problem object
lp, an index has to created via a call to
createIndexGLPK.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Find Row by its Name
Description
Low level interface function to the GLPK function glp_find_row.
Consult the GLPK documentation for more detailed information.
Usage
findRowGLPK(lp, rname)
Arguments
lp |
An object of class |
rname |
A row name. |
Details
Interface to the C function findRow which calls the GLPK
function glp_find_row.
Value
Returns the ordinal number of a row, which is assigned the specified rname.
Note
Before calling findRowGLPK for the first time on a problem object
lp, an index has to created via a call to
createIndexGLPK.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Basis Factorization Control parameters
Description
Returns the names and values of members in the structure
glp_bfcp. Consult the GLPK documentation for
more detailed information.
Usage
getBfcpGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getBfcp.
Value
The function returns a list.
integer |
The names and corresponding values of all integer
control parameters in |
double |
The names and corresponding values of all double
control parameters in |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Retrieve Basis Header Information
Description
Low level interface function to the GLPK function glp_get_bhead.
Consult the GLPK documentation for more detailed information.
Usage
getBheadGLPK(lp, k)
Arguments
lp |
An object of class |
k |
Index of the basic variable. |
Details
Interface to the C function getBhead which calls the GLPK
function glp_get_bhead.
Value
Index of the auxiliary/structural variable.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Index in the Basis Header
Description
Low level interface function to the GLPK function glp_get_col_bind.
Consult the GLPK documentation for more detailed information.
Usage
getCbindGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Structural variable |
Details
Interface to the C function getCbind which calls the GLPK
function glp_get_col_bind.
Value
Index of the basic variable.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Dual Value
Description
Low level interface function to the GLPK function glp_get_col_dual.
Consult the GLPK documentation for more detailed information.
Usage
getColDualGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number |
Details
Interface to the C function getColDual which calls the GLPK
function glp_get_col_dual.
Value
Column dual value
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Dual Value
Description
Low level interface function to the GLPK function glp_ipt_col_dual.
Consult the GLPK documentation for more detailed information.
Usage
getColDualIptGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number |
Details
Interface to the C function getColDualIpt which calls the GLPK
function glp_ipt_col_dual.
Value
Column dual value
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Kind
Description
Low level interface function to the GLPK function glp_get_col_kind.
Consult the GLPK documentation for more detailed information.
Usage
getColKindGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number |
Details
Interface to the C function getColKind which calls the GLPK
function glp_get_col_kind.
Value
Column Kind
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Lower Bound
Description
Low level interface function to the GLPK function glp_get_col_lb.
Consult the GLPK documentation for more detailed information.
Usage
getColLowBndGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getColLowBnd which calls the GLPK
function glp_get_col_lb.
Value
The lower bound of the j-th column (the corresponding structural
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Name
Description
Low level interface function to the GLPK function glp_get_col_name.
Consult the GLPK documentation for more detailed information.
Usage
getColNameGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getColName which calls the GLPK
function glp_get_col_name.
Value
The assigned name of the j-th column is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Primal Value
Description
Low level interface function to the GLPK function glp_get_col_prim.
Consult the GLPK documentation for more detailed information.
Usage
getColPrimGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getColPrim which calls the GLPK
function glp_get_col_prim.
Value
The primal value of the j-th column (the corresponding structural
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Primal Value
Description
Low level interface function to the GLPK function glp_ipt_col_prim.
Consult the GLPK documentation for more detailed information.
Usage
getColPrimIptGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getColPrimIpt which calls the GLPK
function glp_ipt_col_prim.
Value
The primal value of the j-th column (the corresponding structural
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Status
Description
Low level interface function to the GLPK function glp_get_col_stat.
Consult the GLPK documentation for more detailed information.
Usage
getColStatGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number |
Details
Interface to the C function getColStat which calls the GLPK
function glp_get_col_stat.
Value
Column status
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrieve Column Type
Description
Low level interface function to the GLPK function glp_get_col_type.
Consult the GLPK documentation for more detailed information.
Usage
getColTypeGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getColType which calls the GLPK
function glp_get_col_type.
Value
The type of the j-th column (the corresponding structural
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrieve Column Upper Bound
Description
Low level interface function to the GLPK function glp_get_col_ub.
Consult the GLPK documentation for more detailed information.
Usage
getColUppBndGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getColUppBnd which calls the GLPK
function glp_get_col_ub.
Value
The upper bound of the j-th column (the corresponding structural
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Dual Value of all Columns
Description
This is an advanced version of getColDualGLPK.
Usage
getColsDualGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getColsDual which calls the GLPK
function glp_get_col_dual.
Value
The column dual values of all columns (structural variables) are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Dual Value of all Columns
Description
This is an advanced version of getColDualIptGLPK.
Usage
getColsDualIptGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getColDualIpt which calls the GLPK
function glp_ipt_col_dual.
Value
The column dual values of all columns are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Kind
Description
This is an advanced version of getColKindGLPK.
Usage
getColsKindGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
Details
Interface to the C function getColsKind which calls the GLPK
function glp_get_col_ub.
Value
The column kinds of all specified columns (j) are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Lower Bounds of Specified Columns
Description
This is an advanced version of getColLowBndGLPK.
Here, j can be an integer vector.
Usage
getColsLowBndsGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
Details
Interface to the C function getColsLowBnds which calls the GLPK
function glp_get_col_lb.
Value
The lower bounds of all specified columns (j) (the
corresponding structural variables) are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve all Column Primal Values
Description
This is an advanced version of getColPrimGLPK.
Usage
getColsPrimGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getColsPrim which calls the GLPK
functions glp_get_col_prim and glp_get_num_cols.
Value
Returns all values of the stuctural variables as a numeric vector.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve all Column Primal Values
Description
This is an advanced version of getColPrimGLPK.
Usage
getColsPrimIptGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getColsPrimIpt which calls the GLPK
functions glp_ipt_col_prim and glp_get_num_cols.
Value
Returns all values of the stuctural variables as a numeric vector.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Status of all Columns
Description
This is an advanced version of getColStatGLPK.
Usage
getColsStatGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getColsStat which calls the GLPK
function glp_get_col_stat.
Value
The column status of all columns are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Upper Bounds of Specified Columns
Description
This is an advanced version of getColUppBndGLPK.
Here, j can be an integer vector.
Usage
getColsUppBndsGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
Details
Interface to the C function getColsUppBnds which calls the GLPK
function glp_get_col_ub.
Value
The upper bounds of all specified columns (j) (the
corresponding structural variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Status of Dual Basic Solution
Description
Low level interface function to the GLPK function glp_get_dual_stat.
Consult the GLPK documentation for more detailed information.
Usage
getDualStatGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getDualStat which calls the GLPK
function glp_get_dual_stat.
Value
Status of dual basic solution
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrives the Control Parameters for the Interior-point Method.
Description
Returns the names and values of members in the structure
glp_iptcp. Consult the GLPK documentation for
more detailed information.
Usage
getInteriorParmGLPK()
Details
Interface to the C function getInteriorParm.
Value
The function returns a list.
integer |
The names and corresponding values of all integer
control parameters in |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Retrives the Control Parameters for MIP.
Description
Returns the names and values of members in the structure
glp_iocp. Consult the GLPK documentation for
more detailed information.
Usage
getMIPParmGLPK()
Details
Interface to the C function getMIPParm.
Value
The function returns a list.
integer |
The names and corresponding values of all integer
control parameters in |
double |
The names and corresponding values of all double
control parameters in |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Retrieves Column j of the Constraint Matrix.
Description
Low level interface function to the GLPK function glp_get_mat_col.
Consult the GLPK documentation for more detailed information.
Usage
getMatColGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getMatCol which calls the GLPK
functions glp_get_num_rows and glp_get_mat_col.
Value
Returns NULL or a list containing the non zero elements of column j:
nnz |
number of non zero elements in column j |
index |
row indices of the non zero elements in column j |
value |
numerical values of the non zero elements in column j |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieves Row i of the Constraint Matrix.
Description
Low level interface function to the GLPK function glp_get_mat_row.
Consult the GLPK documentation for more detailed information.
Usage
getMatRowGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number i. |
Details
Interface to the C function getMatRow which calls the GLPK
functions glp_get_num_cols and glp_get_mat_row.
Value
Returns NULL or a list containing the non zero elements of row i:
nnz |
number of non zero elements in row i |
index |
column indices of the non zero elements in row i |
value |
numerical values of the non zero elements in row i |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Number of Binary Columns
Description
Low level interface function to the GLPK function glp_get_num_bin.
Consult the GLPK documentation for more detailed information.
Usage
getNumBinGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getNumBin which calls the GLPK
function glp_get_num_bin.
Value
Number of binary columns.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Number of Columns
Description
Low level interface function to the GLPK function glp_get_num_cols.
Consult the GLPK documentation for more detailed information.
Usage
getNumColsGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getNumCols which calls the GLPK
function glp_get_num_cols.
Value
Returns the current number of columns in the specified problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Number of Integer Columns
Description
Low level interface function to the GLPK function glp_get_num_int.
Consult the GLPK documentation for more detailed information.
Usage
getNumIntGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getNumInt which calls the GLPK
function glp_get_num_int.
Value
Number of integer columns.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve the Number of Constraint Coefficients
Description
Low level interface function to the GLPK function glp_get_num_nz.
Consult the GLPK documentation for more detailed information.
Usage
getNumNnzGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getNumNnz which calls the GLPK
function glp_get_num_nz.
Value
Returns the number of non-zero elements in the constraint matrix of the specified problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Number of Rows
Description
Low level interface function to the GLPK function glp_get_num_rows.
Consult the GLPK documentation for more detailed information.
Usage
getNumRowsGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getNumRows which calls the GLPK
function glp_get_num_rows.
Value
Returns the current number of rows in the specified problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Objective Coefficient or Constant Term
Description
Low level interface function to the GLPK function glp_get_obj_coef.
Consult the GLPK documentation for more detailed information.
Usage
getObjCoefGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getObjCoef which calls the GLPK
function glp_get_obj_coef.
Value
The objective coefficient at the j-th column (the
corresponding structural variable) is returned. If j
is 0, the constant term “shift” of the
objective function is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Objective Coefficients at Specified Columns and/or Constant Term
Description
This is an advanced version of getObjCoefGLPK.
Here, j can be an integer vector.
Usage
getObjCoefsGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
Details
Interface to the C function getObjCoef which calls the GLPK
function glp_get_obj_coef.
Value
The objective coefficient at all specified columns (j)
(the corresponding structural variable) is returned. If
j is 0, the constant term “shift” of the
objective function is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Optimization Direction Flag
Description
Low level interface function to the GLPK function glp_get_obj_dir.
Consult the GLPK documentation for more detailed information.
Usage
getObjDirGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getObjDir which calls the GLPK
function glp_get_obj_dir.
Value
Returns the optimization direction flag.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrieve Objective Function Name
Description
Low level interface function to the GLPK function glp_get_obj_name.
Consult the GLPK documentation for more detailed information.
Usage
getObjNameGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getObjName which calls the GLPK
function glp_get_obj_name.
Value
The assigned name of the objective function is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Objective Value
Description
Low level interface function to the GLPK function glp_get_obj_val.
Consult the GLPK documentation for more detailed information.
Usage
getObjValGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getObjVal which calls the GLPK
function glp_get_obj_val.
Value
Returns the current value of the objective function.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Objective Value
Description
Low level interface function to the GLPK function glp_ipt_obj_val.
Consult the GLPK documentation for more detailed information.
Usage
getObjValIptGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getObjValIpt which calls the GLPK
function glp_ipt_obj_val.
Value
Returns the current value of the objective function.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Status of Primal Basic Solution
Description
Low level interface function to the GLPK function glp_get_prim_stat.
Consult the GLPK documentation for more detailed information.
Usage
getPrimStatGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getPrimStat which calls the GLPK
function glp_get_prim_stat.
Value
Status of primal basic solution
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrieve Problem Name
Description
Low level interface function to the GLPK function glp_get_prob_name.
Consult the GLPK documentation for more detailed information.
Usage
getProbNameGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getProbName which calls the GLPK
function glp_get_prob_name.
Value
The assigned name of the problem is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Index in the Basis Header
Description
Low level interface function to the GLPK function glp_get_row_bind.
Consult the GLPK documentation for more detailed information.
Usage
getRbindGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Auxiliary variable |
Details
Interface to the C function getRbind which calls the GLPK
function glp_get_row_bind.
Value
Index of the basic variable.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve row scale factor
Description
Low level interface function to the GLPK function glp_get_rii.
Consult the GLPK documentation for more detailed information.
Usage
getRiiGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number i. |
Details
Interface to the C function getRii which calls the GLPK
function glp_get_rii.
Value
Returns the current scale factor r_{ii} for row i of the specified
problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Dual Value
Description
Low level interface function to the GLPK function glp_get_row_dual.
Consult the GLPK documentation for more detailed information.
Usage
getRowDualGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number |
Details
Interface to the C function getRowDual which calls the GLPK
function glp_get_row_dual.
Value
Row dual value
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Dual Value
Description
Low level interface function to the GLPK function glp_ipt_row_dual.
Consult the GLPK documentation for more detailed information.
Usage
getRowDualIptGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number |
Details
Interface to the C function getRowDualIpt which calls the GLPK
function glp_ipt_row_dual.
Value
Row dual value
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Lower Bound
Description
Low level interface function to the GLPK function glp_get_row_lb.
Consult the GLPK documentation for more detailed information.
Usage
getRowLowBndGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number i. |
Details
Interface to the C function getRowLowBnd which calls the GLPK
function glp_get_row_lb.
Value
The lower bound of the i-th row (the corresponding auxiliary
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Name
Description
Low level interface function to the GLPK function glp_get_row_name.
Consult the GLPK documentation for more detailed information.
Usage
getRowNameGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number i. |
Details
Interface to the C function getRowName which calls the GLPK
function glp_get_row_name.
Value
The assigned name of the i-th row is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Primal Value
Description
Low level interface function to the GLPK function glp_get_row_prim.
Consult the GLPK documentation for more detailed information.
Usage
getRowPrimGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number |
Details
Interface to the C function getRowPrim which calls the GLPK
function glp_get_row_prim.
Value
Row primal value
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Primal Value
Description
Low level interface function to the GLPK function glp_ipt_row_prim.
Consult the GLPK documentation for more detailed information.
Usage
getRowPrimIptGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number |
Details
Interface to the C function getRowPrimIpt which calls the GLPK
function glp_ipt_row_prim.
Value
Row primal value
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Status
Description
Low level interface function to the GLPK function glp_get_row_stat.
Consult the GLPK documentation for more detailed information.
Usage
getRowStatGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number |
Details
Interface to the C function getRowStat which calls the GLPK
function glp_get_row_stat.
Value
Row status
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrieve Row Type
Description
Low level interface function to the GLPK function glp_get_row_type.
Consult the GLPK documentation for more detailed information.
Usage
getRowTypeGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number i. |
Details
Interface to the C function getRowType which calls the GLPK
function glp_get_row_type.
Value
The type of the i-th row (the corresponding auxiliary
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Retrieve Row Upper Bound
Description
Low level interface function to the GLPK function glp_get_row_ub.
Consult the GLPK documentation for more detailed information.
Usage
getRowUppBndGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number i. |
Details
Interface to the C function getRowUppBnd which calls the GLPK
function glp_get_row_ub.
Value
The upper bound of the i-th row (the corresponding auxiliary
variable) is returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Dual Values of all Rows
Description
This is an advanced version of getRowDualGLPK.
Usage
getRowsDualGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getRowsDual which calls the GLPK
function glp_get_row_stat.
Value
The row dual values of all rows are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Dual Value of all Rows
Description
This is an advanced version of getRowDualIptGLPK.
Usage
getRowsDualIptGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getRowsDualIpt which calls the GLPK
function glp_ipt_row_dual.
Value
The row dual values of all rows are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Lower Bounds of Specified Rows
Description
This is an advanced version of getRowLowBndGLPK.
Here, i can be an integer vector.
Usage
getRowsLowBndsGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Vector of row numbers. |
Details
Interface to the C function getRowsLowBnds which calls the GLPK
function glp_get_row_lb.
Value
The lower bounds of all specified columns (i) (the
corresponding auxiliary variables) are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Primal Value of all Rows
Description
This is an advanced version of getRowPrimGLPK.
Usage
getRowsPrimGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getRowsPrim which calls the GLPK
function glp_get_row_prim.
Value
The row primal values for all rows are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Primal Value of all Rows
Description
This is an advanced version of getRowPrimIptGLPK.
Usage
getRowsPrimIptGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getRowsPrimIpt which calls the GLPK
function glp_ipt_row_prim.
Value
The row primal values of all rows are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Status of all Rows
Description
This is an advanced version of getRowStatGLPK.
Usage
getRowsStatGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getRowsStat which calls the GLPK
function glp_get_row_stat.
Value
The row status values of all rows are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Types of Specified Constraints (Rows)
Description
This is an advanced version of getRowTypeGLPK.
Here, i can be an integer vector.
Usage
getRowsTypesGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Vector of row numbers. |
Details
Interface to the C function getRowsTypes which calls the GLPK
function glp_get_row_type.
Value
A numeric vector of the same length as i giving the constraint type
of the specified rows.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section
‘type of auxiliary/structural variable’.
Retrieve Upper Bounds of Specified Rows
Description
This is an advanced version of getRowUppBndGLPK.
Here, i can be an integer vector.
Usage
getRowsUppBndsGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Vector of row numbers. |
Details
Interface to the C function getRowsUppBnds which calls the GLPK
function glp_get_row_ub.
Value
The upper bounds of all specified columns (i) (the
corresponding auxiliary variables) are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrives the Control Parameters for the Simplex Method.
Description
Returns the names and values of members in the structure
glp_smcp. Consult the GLPK documentation for
more detailed information.
Usage
getSimplexParmGLPK()
Details
Interface to the C function getSimplexParm.
Value
The function returns a list.
integer |
The names and corresponding values of all integer
control parameters in |
double |
The names and corresponding values of all double
control parameters in |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Retrieve column scale factor
Description
Low level interface function to the GLPK function glp_get_sjj.
Consult the GLPK documentation for more detailed information.
Usage
getSjjGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number j. |
Details
Interface to the C function getSjj which calls the GLPK
function glp_get_sjj.
Value
Returns the current scale factor s_{jj} for column j of the
specified problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Determine Generic Status of the Basic Soluton
Description
Low level interface function to the GLPK function glp_get_status.
Consult the GLPK documentation for more detailed information.
Usage
getSolStatGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getSolStat which calls the GLPK
function glp_get_status.
Value
Returns the generic status of the current basic solution for the specified problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Determine Solution Status
Description
Low level interface function to the GLPK function glp_ipt_status.
Consult the GLPK documentation for more detailed information.
Usage
getSolStatIptGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getSolStatIpt which calls the GLPK
function glp_ipt_status.
Value
Returns the generic status of the current basic solution for the specified problem object.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Determine Variable Causing Unboundedness
Description
Low level interface function to the GLPK function glp_get_unbnd_ray.
Consult the GLPK documentation for more detailed information.
Usage
getUnbndRayGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function getUnbndRay which calls the GLPK
function glp_get_unbnd_ray.
Value
Returns the number k of a variable, which causes primal or dual unboundedness.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Constants, Return and Status Codes of GLPK
Description
This is a list containing constants used by GLPK. Cunsult the glpk manual for more information, in praticular for the control parameters.
Control Parameters
Simplex
MSG_LEV <- 101 | Message level for terminal output (default: GLP_MSG_ALL). |
METH <- 102 | Simplex method option (default: GLP_PRIMAL). |
PRICING <- 103 | Pricing technique (default: GLP_PT_PSE). |
R_TEST <- 104 | Ratio test technique (default: GLP_RT_HAR). |
IT_LIM <- 105 | Simplex iteration limit (default: INT_MAX). |
TM_LIM <- 106 | Searching time limit, in milliseconds (default: INT_MAX). |
OUT_FRQ <- 107 | Output frequency, in iterations (default: 500). |
OUT_DLY <- 108 | Output delay, in milliseconds (default: 0). |
PRESOLVE <- 109 | LP presolver option (default: GLP_OFF). |
TOL_BND <- 201 | Tolerance used to check if the basic solution is primal feasible (default: 1e-7). |
TOL_DJ <- 202 | Tolerance used to check if the basic solution is dual feasible (default: 1e-7). |
TOL_PIV <- 203 | Tolerance used to choose eligble pivotal elements of the simplex table (default: 1e-10). |
OBJ_LL <- 204 | Lower limit of the objective function (default: -DBL_MAX). |
OBJ_UL <- 205 | Upper limit of the objective function (default: DBL_MAX). |
The exact simplex method uses only the parameters IT_LIM and TM_LIM.
Interior
MSG_LEV <- 101 | Message level for terminal output (default: GLP_MSG_ALL). |
ORD_ALG <- 301 | Ordering algorithm used prior to Cholesky factorization (default: GLP_ORD_AMD). |
MIP
MSG_LEV <- 101 | Message level for terminal output (default: GLP_MSG_ALL). |
TM_LIM <- 106 | Searching time limit, in milliseconds (default: INT_MAX). |
OUT_FRQ <- 107 | Output frequency, in iterations (default: 5000). |
OUT_DLY <- 108 | Output delay, in milliseconds (default: 10000). |
PRESOLVE <- 109 | MIP presolver option (default: GLP_OFF). |
BR_TECH <- 601 | Branching technique option (default: GLP_BR_DTH). |
BT_TECH <- 602 | Backtracking technique option (default: GLP_BT_BLB). |
PP_TECH <- 603 | Preprocessing technique option (default: GLP_PP_ALL). |
FP_HEUR <- 604 | Feasibility pump heuristic option (default: GLP_OFF). |
GMI_CUTS <- 605 | Gomory's mixed integer cut option (default: GLP_OFF). |
MIR_CUTS <- 606 | Mixed integer rounding (MIR) cut option (default: GLP_OFF). |
COV_CUTS <- 607 | Mixed cover cut option (default: GLP_OFF). |
CLQ_CUTS <- 608 | Clique cut option (default: GLP_OFF). |
CB_SIZE <- 609 | The number of extra (up to 256) bytes allocated for each node of the branch-and-bound tree to store application-specific data. On creating a node these bytes are initialized by binary zeros (default: 0). |
BINARIZE <- 610 | LP presolver option (default: GLP_OFF). |
CB_FUNC <- 651 | Use a user defined callback routine glpkCallback which is written in the file ‘glpkCallback.c’. This file should be edited according to the users requirements. If set to GLP_ON, the callback routine defined there is used (default: NULL). |
TOL_INT <- 701 | Absolute tolerance used to check if optimal solution to the current LP relaxation is integer feasible (default: 1e-5). |
TOL_OBJ <- 702 | Relative tolerance used to check if the objective value in optimal solution to the current LP relaxation is not better than in the best known inte- ger feasible solution (default: 1e-7). |
MIP_GAP <- 703 | The relative mip gap tolerance. If the relative mip gap for currently known best integer feasible solution falls below this tolerance, the solver terminates the search. This allows obtainig suboptimal integer feasible solutions if solving the problem to optimality takes too long time (default: 0.0). |
Basis Factorization
TYPE <- 401 | Basis factorization type (default: GLP_BF_FT). |
LU_SIZE <- 402 | Initial size of the Sparse Vector Area (default: 0). |
PIV_LIM <- 403 | computing LU-factorization of the basis matrix (default: 4). |
SUHL <- 404 | computing LU-factorization of the basis matrix (default: GLP_ON). |
NFS_MAX <- 405 | Maximal number of additional row-like factors (default: 100). |
NRS_MAX <- 406 | Maximal number of additional rows and columns (default: 100). |
RS_SIZE <- 407 | Initial size of the Sparse Vector Area (default: 0). |
PIV_TOL <- 501 | Threshold pivoting (Markowitz) tolerance (default: 0.10). |
EPS_TOL <- 502 | Epsilon tolerance (default: 1e-15). |
MAX_GRO <- 503 | Maximal growth of elements of factor U (default: 1e+10). |
UPD_TOL <- 504 | Update tolerance (default: 1e-6). |
LP/MIP problem object
optimization direction flag
GLP_MIN <- 1 | minimization |
GLP_MAX <- 2 | maximization |
kind of structural variable
GLP_CV <- 1 | continuous variable |
GLP_IV <- 2 | integer variable |
GLP_BV <- 3 | binary variable |
type of auxiliary/structural variable
GLP_FR <- 1 | free variable |
GLP_LO <- 2 | variable with lower bound |
GLP_UP <- 3 | variable with upper bound |
GLP_DB <- 4 | double-bounded variable |
GLP_FX <- 5 | fixed variable |
status of auxiliary/structural variable
GLP_BS <- 1 | basic variable |
GLP_NL <- 2 | non-basic variable on lower bound |
GLP_NU <- 3 | non-basic variable on upper bound |
GLP_NF <- 4 | non-basic free variable |
GLP_NS <- 5 | non-basic fixed variable |
scaling options
GLP_SF_GM <- 0x01 | perform geometric mean scaling |
GLP_SF_EQ <- 0x10 | perform equilibration scaling |
GLP_SF_2N <- 0x20 | round scale factors to power of two |
GLP_SF_SKIP <- 0x40 | skip if problem is well scaled |
GLP_SF_AUTO <- 0x80 | choose scaling options automatically |
solution indicator
GLP_SOL <- 1 | basic solution |
GLP_IPT <- 2 | interior-point solution |
GLP_MIP <- 3 | mixed integer solution |
solution status
GLP_UNDEF <- 1 | solution is undefined |
GLP_FEAS <- 2 | solution is feasible |
GLP_INFEAS <- 3 | solution is infeasible |
GLP_NOFEAS <- 4 | no feasible solution exists |
GLP_OPT <- 5 | solution is optimal |
GLP_UNBND <- 6 | solution is unbounded |
basis factorization control parameters
type
GLP_BF_FT <- 0x01 | LUF + Forrest-Tomlin |
GLP_BF_BG <- 0x02 | LUF + Schur compl. + Bartels-Golub |
GLP_BF_GR <- 0x03 | LUF + Schur compl. + Givens rotation |
GLP_BF_LUF <- 0x00 | plain LU-factorization |
GLP_BF_BTF <- 0x10 | block triangular LU-factorization |
simplex method control parameters
msg_lev message level:
GLP_MSG_OFF <- 0 | no output |
GLP_MSG_ERR <- 1 | warning and error messages only |
GLP_MSG_ON <- 2 | normal output |
GLP_MSG_ALL <- 3 | full output |
GLP_MSG_DBG <- 4 | debug output |
meth simplex method option:
GLP_PRIMAL <- 1 | use primal simplex |
GLP_DUALP <- 2 | use dual; if it fails, use primal |
GLP_DUAL <- 3 | use dual simplex |
pricing pricing technique:
GLP_PT_STD <- 0x11 | standard (Dantzig rule) |
GLP_PT_PSE <- 0x22 | projected steepest edge |
r_test ratio test technique:
GLP_RT_STD <- 0x11 | standard (textbook) |
GLP_RT_HAR <- 0x22 | two-pass Harris' ratio test |
interior-point solver control parameters
ord_alg ordering algorithm:
GLP_ORD_NONE <- 0 | natural (original) ordering |
GLP_ORD_QMD <- 1 | quotient minimum degree (QMD) |
GLP_ORD_AMD <- 2 | approx. minimum degree (AMD) |
GLP_ORD_SYMAMD <- 3 | approx. minimum degree (SYMAMD) |
integer optimizer control parameters
br_tech branching technique:
GLP_BR_FFV <- 1 | first fractional variable |
GLP_BR_LFV <- 2 | last fractional variable |
GLP_BR_MFV <- 3 | most fractional variable |
GLP_BR_DTH <- 4 | heuristic by Driebeck and Tomlin |
GLP_BR_HPC <- 5 | hybrid pseudocost |
bt_tech backtracking technique:
GLP_BT_DFS <- 1 | depth first search |
GLP_BT_BFS <- 2 | breadth first search |
GLP_BT_BLB <- 3 | best local bound |
GLP_BT_BPH <- 4 | best projection heuristic |
pp_tech preprocessing technique:
GLP_PP_NONE <- 0 | disable preprocessing |
GLP_PP_ROOT <- 1 | preprocessing only on root level |
GLP_PP_ALL <- 2 | preprocessing on all levels |
additional row attributes
the row origin flag
GLP_RF_REG <- 0 | regular constraint |
GLP_RF_LAZY <- 1 | "lazy" constraint |
GLP_RF_CUT <- 2 | cutting plane constraint |
the row class descriptor klass
GLP_RF_GMI <- 1 | Gomory's mixed integer cut |
GLP_RF_MIR <- 2 | mixed integer rounding cut |
GLP_RF_COV <- 3 | mixed cover cut |
GLP_RF_CLQ <- 4 | clique cut |
enable/disable flag
GLP_ON <- 1 | enable something |
GLP_OFF <- 0 | disable something |
reason codes
GLP_IROWGEN <- 0x01 | request for row generation |
GLP_IBINGO <- 0x02 | better integer solution found |
GLP_IHEUR <- 0x03 | request for heuristic solution |
GLP_ICUTGEN <- 0x04 | request for cut generation |
GLP_IBRANCH <- 0x05 | request for branching |
GLP_ISELECT <- 0x06 | request for subproblem selection |
GLP_IPREPRO <- 0x07 | request for preprocessing |
branch selection indicator
GLP_NO_BRNCH <- 0 | select no branch |
GLP_DN_BRNCH <- 1 | select down-branch |
GLP_UP_BRNCH <- 2 | select up-branch |
return codes
GLP_EBADB <- 0x01 | invalid basis |
GLP_ESING <- 0x02 | singular matrix |
GLP_ECOND <- 0x03 | ill-conditioned matrix |
GLP_EBOUND <- 0x04 | invalid bounds |
GLP_EFAIL <- 0x05 | solver failed |
GLP_EOBJLL <- 0x06 | objective lower limit reached |
GLP_EOBJUL <- 0x07 | objective upper limit reached |
GLP_EITLIM <- 0x08 | iteration limit exceeded |
GLP_ETMLIM <- 0x09 | time limit exceeded |
GLP_ENOPFS <- 0x0A | no primal feasible solution |
GLP_ENODFS <- 0x0B | no dual feasible solution |
GLP_EROOT <- 0x0C | root LP optimum not provided |
GLP_ESTOP <- 0x0D | search terminated by application |
GLP_EMIPGAP <- 0x0E | relative mip gap tolerance reached |
GLP_ENOFEAS <- 0x0F | no primal/dual feasible solution |
GLP_ENOCVG <- 0x10 | no convergence |
GLP_EINSTAB <- 0x11 | numerical instability |
GLP_EDATA <- 0x12 | invalid data |
GLP_ERANGE <- 0x13 | result out of range |
condition indicator
GLP_KKT_PE <- 1 | primal equalities |
GLP_KKT_PB <- 2 | primal bounds |
GLP_KKT_DE <- 3 | dual equalities |
GLP_KKT_DB <- 4 | dual bounds |
GLP_KKT_CS <- 5 | complementary slackness |
MPS file format
GLP_MPS_DECK <- 1 | fixed (ancient) |
GLP_MPS_FILE <- 2 | free (modern) |
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
status_codeGLPK, return_codeGLPK
Class "glpkPtr"
Description
Structure of the class "glpkPtr". Objects of that class are
used to hold pointers to C structures used by GLPK.
Objects from the Class
Objects can be created by calls of the form
test <- initProbGLPK() or
test <- mplAllocWkspGLPK().
Slots
glpkPtrType:-
Object of class
"character"giving the pointer type. glpkPointer:-
Object of class
"externalptr"containig the pointer to a C structure.
Methods
- isGLPKpointer
signature(object = "glpkPtr"): returnsTRUEifglpkPointer(object)is a pointer to a GLPK problem object, otherwiseFALSE.- isNULLpointerGLPK
signature(object = "glpkPtr"): returnsTRUEifglpkPointer(object)is a NULL pointer, otherwiseFALSE.- isTRWKSpointer
signature(object = "glpkPtr"): returnsTRUEifglpkPointer(object)is a pointer to a MathProg translator workspace, otherwiseFALSE.- glpkPointer
signature(object = "glpkPtr"): gets theglpkPointerslot.- glpkPtrType
signature(object = "glpkPtr"): gets theglpkPtrTypeslot.- glpkPtrType<-
signature(object = "glpkPtr"): sets theglpkPtrTypeslot.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK and initProbGLPK.
Examples
showClass("glpkPtr")
Create a GLPK Problem Object
Description
Low level interface function to the GLPK function glp_create_prob.
Consult the GLPK documentation for more detailed information.
Usage
initProbGLPK(ptrtype = "glpk_prob")
Arguments
ptrtype |
A name for the pointer to a GLPK problem object. |
Details
Interface to the C function initProb which calls the GLPK
function glp_create_prob.
Value
An instance of class "glpkPtr".
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
"glpkPtr".
Load/Replace the Whole Constraint Matrix
Description
Low level interface function to the GLPK function glp_load_matrix.
Consult the GLPK documentation for more detailed information.
Usage
loadMatrixGLPK(lp, ne, ia, ja, ra)
Arguments
lp |
An object of class |
ne |
Number of non-zero elements. |
ia |
Row indices of the non-zero elements. |
ja |
Colunm indices of the non-zero elements. |
ra |
The numeric values of the constraint coefficients. |
Details
Interface to the C function loadMatrix which calls the GLPK
function glp_load_matrix.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Value
Description
Low level interface function to the GLPK function glp_mip_col_val.
Consult the GLPK documentation for more detailed information.
Usage
mipColValGLPK(lp, j)
Arguments
lp |
An object of class |
j |
Column number |
Details
Interface to the C function mipColVal which calls the GLPK
function glp_mip_col_val.
Value
Column value of column j.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Column Value of all Columns
Description
This is an advanced version of mipColValGLPK.
Usage
mipColsValGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function mipColsVal which calls the GLPK
function glp_mip_col_val.
Value
The column values of all columns are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Objective Value
Description
Low level interface function to the GLPK function glp_mip_obj_val.
Consult the GLPK documentation for more detailed information.
Usage
mipObjValGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function mipObjVal which calls the GLPK
function glp_mip_obj_val.
Value
Objective value.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Value
Description
Low level interface function to the GLPK function glp_mip_row_val.
Consult the GLPK documentation for more detailed information.
Usage
mipRowValGLPK(lp, i)
Arguments
lp |
An object of class |
i |
Row number |
Details
Interface to the C function mipRowVal which calls the GLPK
function glp_mip_row_val.
Value
Row value of row i.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Retrieve Row Value of all Rows
Description
This is an advanced version of mipRowValGLPK.
Usage
mipRowsValGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function mipRowsVal which calls the GLPK
function glp_mip_row_val.
Value
The row values of all rows are returned.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Determine Status of MIP Solution
Description
Low level interface function to the GLPK function glp_mip_status.
Consult the GLPK documentation for more detailed information.
Usage
mipStatusGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function mipStatus which calls the GLPK
function glp_mip_status.
Value
Status of MIP Solution.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Allocate Translator Workspace
Description
Low level interface function to the GLPK function glp_mpl_alloc_wksp.
Consult the GLPK documentation for more detailed information.
Usage
mplAllocWkspGLPK(ptrtype = "tr_wksp")
Arguments
ptrtype |
A name for the pointer to a translator workspace. |
Details
Interface to the C function mplAllocWksp which calls the GLPK
function glp_mpl_alloc_wksp.
Value
An instance of class "glpkPtr".
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
"glpkPtr".
Build Problem Instance From Model
Description
Low level interface function to the GLPK function glp_mpl_build_prob.
Consult the GLPK documentation for more detailed information.
Usage
mplBuildProbGLPK(wk, lp)
Arguments
wk |
An object of class |
lp |
A pointer to a GLPK problem object. |
Details
Interface to the C function mplBuildProb which calls the GLPK
function glp_mpl_build_prob.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK,
mplFreeWkspGLPK,
mplGenerateGLPK,
mplPostsolveGLPK,
mplReadDataGLPK and
mplReadModelGLPK.
Free Translator Workspace
Description
Low level interface function to the GLPK function glp_mpl_free_wksp.
Consult the GLPK documentation for more detailed information.
Usage
mplFreeWkspGLPK(wk)
Arguments
wk |
An object of class |
Details
Interface to the C function mplFreeWksp which calls the GLPK
function glp_mpl_free_wksp.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK,
mplBuildProbGLPK,
mplGenerateGLPK,
mplPostsolveGLPK,
mplReadDataGLPK and
mplReadModelGLPK.
Generate the Model
Description
Low level interface function to the GLPK function glp_mpl_generate.
Consult the GLPK documentation for more detailed information.
Usage
mplGenerateGLPK(wk, fname = NULL)
Arguments
wk |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function mplGenerate which calls the GLPK
function glp_mpl_generate.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK,
mplBuildProbGLPK,
mplFreeWkspGLPK,
mplPostsolveGLPK,
mplReadDataGLPK and
mplReadModelGLPK.
Postsolve Model
Description
Low level interface function to the GLPK function glp_mpl_postsolve.
Consult the GLPK documentation for more detailed information.
Usage
mplPostsolveGLPK(wk, lp, sol)
Arguments
wk |
An object of class |
lp |
A pointer to a GLPK problem object. |
sol |
Type of solution to be copied to the translator workspace, for possible
values, see |
Details
Interface to the C function mplPostsolve which calls the GLPK
function glp_mpl_postsolve.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK,
mplBuildProbGLPK,
mplFreeWkspGLPK,
mplGenerateGLPK,
mplReadDataGLPK and
mplReadModelGLPK.
Read and Translate Data Section
Description
Low level interface function to the GLPK function glp_mpl_read_data.
Consult the GLPK documentation for more detailed information.
Usage
mplReadDataGLPK(wk, fname)
Arguments
wk |
An object of class |
fname |
The name of the data file to be read in. |
Details
Interface to the C function mplReadData which calls the GLPK
function glp_mpl_read_data.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK,
mplBuildProbGLPK,
mplFreeWkspGLPK,
mplGenerateGLPK,
mplPostsolveGLPK and
mplReadModelGLPK.
Read and Translate Model Section
Description
Low level interface function to the GLPK function glp_mpl_read_model.
Consult the GLPK documentation for more detailed information.
Usage
mplReadModelGLPK(wk, fname, skip)
Arguments
wk |
An object of class |
fname |
The name of the model file to be read in. |
skip |
Flag, how to treat the data section. |
Details
Interface to the C function mplReadModel which calls the GLPK
function glp_mpl_read_model.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
mplAllocWkspGLPK,
mplBuildProbGLPK,
mplFreeWkspGLPK,
mplGenerateGLPK,
mplPostsolveGLPK and
mplReadDataGLPK.
Write Interior-Point Solution in Printable Format
Description
Low level interface function to the GLPK function glp_print_ipt.
Consult the GLPK documentation for more detailed information.
Usage
printIptGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function printIpt which calls the GLPK
function glp_print_ipt.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
writeSolGLPK, readIptGLPK,
writeIptGLPK, printMIPGLPK,
readMIPGLPK and writeMIPGLPK.
Write Interior-Point Solution in Printable Format
Description
Low level interface function to the GLPK function glp_print_mip.
Consult the GLPK documentation for more detailed information.
Usage
printMIPGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function printMIP which calls the GLPK
function glp_print_mip.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
writeSolGLPK, printIptGLPK,
readIptGLPK, writeIptGLPK,
readMIPGLPK and writeMIPGLPK.
Print Sensitivity Analysis Report
Description
Low level interface function to the GLPK function glp_print_ranges.
Consult the GLPK documentation for more detailed information.
Usage
printRangesGLPK(lp, numrc = 0, rowcol = NULL, fname = "sar.txt")
Arguments
lp |
An object of class |
numrc |
Length of the row/column list (argument |
rowcol |
Ordinal numbers of rows and columns to be analyzed. |
fname |
A filename. |
Details
Interface to the C function printRanges which calls the GLPK
function glp_print_ranges.
Value
Zero on success, otherwise non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Write Basic Solution in Printable Format
Description
Low level interface function to the GLPK function glp_print_sol.
Consult the GLPK documentation for more detailed information.
Usage
printSolGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function printSol which calls the GLPK
function glp_print_sol.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readSolGLPK, writeSolGLPK,
printIptGLPK, readIptGLPK,
writeIptGLPK, printMIPGLPK,
readMIPGLPK and writeMIPGLPK.
Read Interior-Point Solution From Text File
Description
Low level interface function to the GLPK function glp_read_ipt.
Consult the GLPK documentation for more detailed information.
Usage
readIptGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be read in. |
Details
Interface to the C function readIpt which calls the GLPK
function glp_read_ipt.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
writeSolGLPK, printIptGLPK,
writeIptGLPK, printMIPGLPK,
readMIPGLPK and writeMIPGLPK.
Read Problem Data in CPLEX LP Format
Description
Low level interface function to the GLPK function glp_read_lp.
Consult the GLPK documentation for more detailed information.
Usage
readLPGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be read in. |
Details
Interface to the C function readLP which calls the GLPK
function glp_read_lp.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readMPSGLPK, readProbGLPK,
writeMPSGLPK, writeLPGLPK and
writeProbGLPK.
Read MIP Solution From Text File
Description
Low level interface function to the GLPK function glp_read_mip.
Consult the GLPK documentation for more detailed information.
Usage
readMIPGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be read in. |
Details
Interface to the C function readMIP which calls the GLPK
function glp_read_mip.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
writeSolGLPK, printIptGLPK,
readIptGLPK, writeIptGLPK,
printMIPGLPK and writeMIPGLPK.
Read Problem Data in MPS Format
Description
Low level interface function to the GLPK function glp_read_mps.
Consult the GLPK documentation for more detailed information.
Usage
readMPSGLPK(lp, fmt, fname)
Arguments
lp |
An object of class |
fmt |
MPS format. See |
fname |
The name of the text file to be read in. |
Details
Interface to the C function readMPS which calls the GLPK
function glp_read_mps.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readLPGLPK, readProbGLPK,
writeMPSGLPK, writeLPGLPK,
writeProbGLPK and glpkConstants.
Read Problem Data in GLPK F ormat
Description
Low level interface function to the GLPK function glp_read_prob.
Consult the GLPK documentation for more detailed information.
Usage
readProbGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be read in. |
Details
Interface to the C function readProb which calls the GLPK
function glp_read_prob.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readMPSGLPK, readLPGLPK,
writeMPSGLPK, writeLPGLPK and
writeProbGLPK.
Read Basic Solution From Text File
Description
Low level interface function to the GLPK function glp_read_sol.
Consult the GLPK documentation for more detailed information.
Usage
readSolGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be read in. |
Details
Interface to the C function readSol which calls the GLPK
function glp_read_sol.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, writeSolGLPK,
printIptGLPK, readIptGLPK,
writeIptGLPK, printMIPGLPK,
readMIPGLPK and writeMIPGLPK.
Translates a GLPK Return Code into a Human Readable String
Description
Translates a GLPK return code into a human readable string.
Usage
return_codeGLPK(code)
Arguments
code |
Return code from GLPK. |
Value
A character string associated with the GLPK return code.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘return codes’.
Scale Problem Data
Description
Low level interface function to the GLPK function glp_scale_prob.
Consult the GLPK documentation for more detailed information.
Usage
scaleProbGLPK(lp, opt)
Arguments
lp |
An object of class |
opt |
Scaling option, see |
Details
Interface to the C function scaleProb which calls the GLPK
function glp_scale_prob.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Change Basis Factorization Control Parameters
Description
Sets/Changes the values of corresponding members of in the structure
glp_bfcp. Consult the GLPK documentation for more detailed information.
Usage
setBfcpGLPK(lp, parm, val)
Arguments
lp |
An object of class |
parm |
A vector containing integer values or symbolic names
of the control parameters to be changed
(see |
val |
A vector containing the new values for the corresponding control parameters. |
Details
The Arguments parm and val must have the
same length. The value val[i] belongs to the
parameter parm[i].
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Column Bounds
Description
Low level interface function to the GLPK function glp_set_col_bnds.
Consult the GLPK documentation for more detailed information.
Usage
setColBndGLPK(lp, j, type, lb, ub)
Arguments
lp |
An object of class |
j |
Column number |
type |
Column type. For possible values, see |
lb |
Lower bound. |
ub |
Upper bound. |
Details
Interface to the C function setColBnd which calls the GLPK
function glp_set_col_bnds.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set Column Kind
Description
Low level interface function to the GLPK function glp_set_col_kind.
Consult the GLPK documentation for more detailed information.
Usage
setColKindGLPK(lp, j, kind)
Arguments
lp |
An object of class |
j |
Column number |
kind |
Kind of column number |
Details
Interface to the C function setColKind which calls the GLPK
function glp_set_col_kind.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Column Name
Description
Low level interface function to the GLPK function glp_set_col_name.
Consult the GLPK documentation for more detailed information.
Usage
setColNameGLPK(lp, j, cname = NULL)
Arguments
lp |
An object of class |
j |
Column number j. |
cname |
Column name. |
Details
Interface to the C function setColName which calls the GLPK
function glp_set_col_name.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set column status
Description
Low level interface function to the GLPK function glp_set_col_stat.
Consult the GLPK documentation for more detailed information.
Usage
setColStatGLPK(lp, j, stat)
Arguments
lp |
An object of class |
j |
Column number j. |
stat |
A status parameter, see |
Details
Interface to the C function setColStat which calls the GLPK
function glp_set_col_stat.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Column Bounds
Description
This is an advanced version of setColBndGLPK.
Here, j can be an integer vector, lb and ub
can be numeric vectors.
Usage
setColsBndsGLPK(lp, j, lb, ub, type = NULL)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
lb |
Vector of lower bounds. |
ub |
Vector of upper bounds. |
type |
Vector of variable types (default: NULL). For possible values, see
|
Details
Interface to the C function setColsBnds which calls the GLPK
function glp_set_col_bnds.
If type is set to NULL, the type of the variables will be estimated.
If lb[i] equals ub[i], variable j[i] is fixed, otherwise double bounded.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Column Bounds and Objective Coefficients and/or Constant Term
Description
This is an combined version of setColsBndsGLPK and
setObjCoefsGLPK. Here, j can be an integer
vector, lb, ub and obj_coef can be numeric
vectors.
Usage
setColsBndsObjCoefsGLPK(lp, j, lb, ub, obj_coef, type = NULL)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
lb |
Vector of lower bounds. |
ub |
Vector of upper bounds. |
obj_coef |
Vector of objective coefficients. |
type |
Vector of variable types (default: NULL). For possible values, see
|
Details
Interface to the C function setColsBndsObjCoefs which
calls the GLPK functions glp_set_col_bnds and
glp_set_obj_coef.
If type is set to NULL, the type of the variables will be estimated.
If lb[i] equals ub[i], variable j[i] is fixed, otherwise double bounded.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set Column Kind for a Set of Columns
Description
This is an advanced version of setColKindGLPK.
Here, j can be an integer vector.
Usage
setColsKindGLPK(lp, j, kind)
Arguments
lp |
An object of class |
j |
An integer vector of column indices. |
kind |
An integer vector of column kinds, for possible values see
|
Details
Interface to the C function setColsKind which calls the GLPK
function glp_set_col_kind.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Column Names
Description
This is an advanced version of setColNameGLPK.
Here, j can be an integer vector, cnames can be a character
vector.
Usage
setColsNamesGLPK(lp, j, cnames = NULL)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
cnames |
Vector of column names of the same length as |
Details
Interface to the C function setColsNames which calls the GLPK
function glp_set_col_name.
If cnames is set to NULL, all column names for column indices in
j will be removed. If cname[k] is the empty string "",
column name j[k] will be removed.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Sets the Default Control Parameters for the Interior-point Method.
Description
Initializes a new structure glp_iptcp.
Consult the GLPK documentation for more detailed information.
Usage
setDefaultIptParmGLPK()
Details
Interface to the C function setDefaultIptParm which calls the GLPK
function glp_init_iptcp.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Sets the Default Control Parameters for the MIP Method
Description
Initializes a new structure glp_iocp.
Consult the GLPK documentation for more detailed information.
Usage
setDefaultMIPParmGLPK()
Details
Interface to the C function setDefaultMIPParm which calls the GLPK
function glp_init_iocp.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Sets the Default Control Parameters for the Simplex Methods.
Description
Initializes a new structure glp_smcp.
Consult the GLPK documentation for more detailed information.
Usage
setDefaultSmpParmGLPK()
Details
Interface to the C function setDefaultSmpParm which calls the GLPK
function glp_init_smcp.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘Control Parameters’.
Sets/Changes Control Parameters or the Interior-point Method.
Description
Sets/Changes the values of corresponding members of in the structure
glp_iptcp. Consult the GLPK documentation for more detailed
information.
Usage
setInteriorParmGLPK(parm, val)
Arguments
parm |
A vector containing integer values or symbolic names
of the control parameters to be changed
(see |
val |
A vector containing the new values for the corresponding control parameters. |
Details
The Arguments parm and val must have the
same length. The value val[i] belongs to the
parameter parm[i].
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Sets/Changes Control Parameters or the MIP Methods
Description
Sets/Changes the values of corresponding members of in the structure
glp_iocp. Consult the GLPK documentation for more detailed information.
Usage
setMIPParmGLPK(parm, val)
Arguments
parm |
A vector containing integer values or symbolic names
of the control parameters to be changed
(see |
val |
A vector containing the new values for the corresponding control parameters. |
Details
The Arguments parm and val must have the
same length. The value val[i] belongs to the
parameter parm[i].
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set (Replace) Column of the Constraint Matrix
Description
Low level interface function to the GLPK function glp_set_mat_col.
Consult the GLPK documentation for more detailed information.
Usage
setMatColGLPK(lp, j, len, ind, val)
Arguments
lp |
An object of class |
j |
Replace the |
len |
Number of new column elements. |
ind |
Row indices of the new column elements. |
val |
Numerical values of the new column elements. |
Details
Interface to the C function setMatCol which calls the GLPK
function glp_set_mat_col.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set (Replace) Row of the Constraint Matrix
Description
Low level interface function to the GLPK function glp_set_mat_row.
Consult the GLPK documentation for more detailed information.
Usage
setMatRowGLPK(lp, i, len, ind, val)
Arguments
lp |
An object of class |
i |
Replace the |
len |
Number of new row elements. |
ind |
Column indices of the new row elements. |
val |
Numerical values of the new row elements. |
Details
Interface to the C function setMatRow which calls the GLPK
function glp_set_mat_row.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set/Change Objective Coefficient or Constant Term
Description
Low level interface function to the GLPK function glp_set_obj_coef.
Consult the GLPK documentation for more detailed information.
Usage
setObjCoefGLPK(lp, j, obj_coef)
Arguments
lp |
An object of class |
j |
Column number j. |
obj_coef |
Objective coefficient or constant term. |
Details
Interface to the C function setObjCoef which calls the GLPK
function glp_set_obj_coef.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set/Change Objective Coefficients and/or Constant Term
Description
This is an advanced version of setColBndGLPK.
Here, j can be an integer vector, obj_coef
can be a numeric vector.
Usage
setObjCoefsGLPK(lp, j, obj_coef)
Arguments
lp |
An object of class |
j |
Vector of column numbers. |
obj_coef |
Vector of objective coefficients. |
Details
Interface to the C function setObjCoefs which calls the
GLPK function glp_set_obj_coef.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set/Change Optimization Direction Flag
Description
Low level interface function to the GLPK function glp_set_obj_dir.
Consult the GLPK documentation for more detailed information.
Usage
setObjDirGLPK(lp, lpdir)
Arguments
lp |
An object of class |
lpdir |
Optimization direction flag, which can be |
Details
Interface to the C function setObjDir which calls the GLPK
function glp_set_obj_dir.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Set/Change Objective Function Name
Description
Low level interface function to the GLPK function glp_set_obj_name.
Consult the GLPK documentation for more detailed information.
Usage
setObjNameGLPK(lp, oname = NULL)
Arguments
lp |
An object of class |
oname |
Objective Function name. |
Details
Interface to the C function setObjName which calls the GLPK
function glp_set_obj_name.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set/Change Problem Name
Description
Low level interface function to the GLPK function glp_set_prob_name.
Consult the GLPK documentation for more detailed information.
Usage
setProbNameGLPK(lp, pname = NULL)
Arguments
lp |
An object of class |
pname |
Problem name. |
Details
Interface to the C function setProbName which calls the GLPK
function glp_set_prob_name.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set/Change all Row Bounds to Zero
Description
This is an advanced version of setRowsBndsGLPK.
Usage
setRhsZeroGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function setRowsBnds which calls the GLPK
function glp_set_col_bnds. All row bounds are fixed at zero.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set row scale factor
Description
Low level interface function to the GLPK function glp_set_rii.
Consult the GLPK documentation for more detailed information.
Usage
setRiiGLPK(lp, i, rii)
Arguments
lp |
An object of class |
i |
Row number i. |
rii |
Scale factor |
Details
Interface to the C function setRii which calls the GLPK
function glp_set_rii.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set/Change Row Bounds
Description
Low level interface function to the GLPK function glp_set_row_bnds.
Consult the GLPK documentation for more detailed information.
Usage
setRowBndGLPK(lp, i, type, lb, ub)
Arguments
lp |
An object of class |
i |
Row number i. |
type |
Row type. For possible values, see |
lb |
Lower bound. |
ub |
Upper bound. |
Details
Interface to the C function setRowBnd which calls the GLPK
function glp_set_row_bnds.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Row Name
Description
Low level interface function to the GLPK function glp_set_row_name.
Consult the GLPK documentation for more detailed information.
Usage
setRowNameGLPK(lp, i, rname = NULL)
Arguments
lp |
An object of class |
i |
Row number i. |
rname |
Row name. |
Details
Interface to the C function setRowName which calls the GLPK
function glp_set_row_name.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Set row status
Description
Low level interface function to the GLPK function glp_set_row_stat.
Consult the GLPK documentation for more detailed information.
Usage
setRowStatGLPK(lp, i, stat)
Arguments
lp |
An object of class |
i |
Row number i. |
stat |
A status parameter, see |
Details
Interface to the C function setRowStat which calls the GLPK
function glp_set_row_stat, section ‘LP/MIP problem object’.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Row Bounds
Description
This is an advanced version of setRowBndGLPK.
Here, i can be an integer vector, lb and ub
can be numeric vectors.
Usage
setRowsBndsGLPK(lp, i, lb, ub, type = NULL)
Arguments
lp |
An object of class |
i |
Vector of row numbers. |
lb |
Vector of lower bounds. |
ub |
Vector of upper bounds. |
type |
Vector of variable types (default: NULL). For possible values, see
|
Details
Interface to the C function setRowsBnds which calls the GLPK
function glp_set_row_bnds.
If type is set to NULL, the type of the variables will be estimated.
If lb[j] equals ub[j], variable i[j] is fixed, otherwise double bounded.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Set/Change Row Names
Description
This is an advanced version of setRowNameGLPK.
Here, i can be an integer vector, rnames can be a character
vector.
Usage
setRowsNamesGLPK(lp, i, rnames = NULL)
Arguments
lp |
An object of class |
i |
Vector of row numbers. |
rnames |
Vector of row names of the same length as |
Details
Interface to the C function setRowsNames which calls the GLPK
function glp_set_row_name.
If rnames is set to NULL, all row names for row indices in
i will be removed. If rname[k] is the empty string "",
row name i[k] will be removed.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Sets/Changes Control Parameters or the Simplex Methods.
Description
Sets/Changes the values of corresponding members of in the structure
glp_smcp. Consult the GLPK documentation for more detailed information.
Usage
setSimplexParmGLPK(parm, val)
Arguments
parm |
A vector containing integer values or symbolic names
of the control parameters to be changed
(see |
val |
A vector containing the new values for the corresponding control parameters. |
Details
The Arguments parm and val must have the
same length. The value val[i] belongs to the
parameter parm[i].
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
Retrieve column scale factor
Description
Low level interface function to the GLPK function glp_set_sjj.
Consult the GLPK documentation for more detailed information.
Usage
setSjjGLPK(lp, j, sjj)
Arguments
lp |
An object of class |
j |
Column number j. |
sjj |
Scale factor |
Details
Interface to the C function setSjj which calls the GLPK
function glp_set_sjj.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Solve LP Problem with the Interior-Point Method
Description
Low level interface function to the GLPK function glp_interior.
Consult the GLPK documentation for more detailed information.
Usage
solveInteriorGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function solveInterior which calls the GLPK
function glp_interior.
Value
A return code.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘return codes’ and
return_codeGLPK.
Solve MIP Problem with the Branch-and-Cut Method
Description
Low level interface function to the GLPK function glp_intopt.
Consult the GLPK documentation for more detailed information.
Usage
solveMIPGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function solveMIP which calls the GLPK
function glp_intopt.
Value
A return code.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘return codes’ and
return_codeGLPK.
Solve LP Problem in Exact Arithmetic
Description
Low level interface function to the GLPK function glp_exact.
Consult the GLPK documentation for more detailed information.
Usage
solveSimplexExactGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function solveSimplexExact which calls the GLPK
function glp_exact.
Value
A return code.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘return codes’ and
return_codeGLPK.
Solve LP Problem with the Primal or Dual Simplex Method
Description
Low level interface function to the GLPK function glp_simplex.
Consult the GLPK documentation for more detailed information.
Usage
solveSimplexGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function solveSimplex which calls the GLPK
function glp_simplex.
Value
A return code.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘return codes’ and
return_codeGLPK.
Sort Elements of the Constraint Matrix
Description
Low level interface function to the GLPK function glp_sort_matrix.
Consult the GLPK documentation for more detailed information.
Usage
sortMatrixGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function sortMatrix which calls the GLPK
function glp_sort_matrix.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Translates a GLPK Status Value into a Human Readable String
Description
Translates a GLPK status code into a human readable string.
Usage
status_codeGLPK(code)
Arguments
code |
Status code from GLPK. |
Value
A character string associated with the GLPK status code.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘LP/MIP problem object’.
Contruct Standard Initial LP Basis
Description
Low level interface function to the GLPK function glp_std_basis.
Consult the GLPK documentation for more detailed information.
Usage
stdBasisGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function stdBasis which calls the GLPK
function glp_std_basis.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Enable/Disable Terminal Output
Description
Low level interface function to the GLPK function glp_term_out.
Consult the GLPK documentation for more detailed information.
Usage
termOutGLPK(flag)
Arguments
flag |
GLPK enable/disable flag: |
Details
Interface to the C function termOut which calls the GLPK
function glp_term_out.
Value
Returns the previous value of the terminal output flag.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
glpkConstants, section ‘enable/disable flag’.
Problem unscaling
Description
Low level interface function to the GLPK function glp_unscale_prob.
Consult the GLPK documentation for more detailed information.
Usage
unscaleProbGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function unscaleProb which calls the GLPK
function glp_unscale_prob.
Value
NULL
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Determine GLPK Callable Library Version
Description
Low level interface function to the GLPK function glp_version.
Consult the GLPK documentation for more detailed information.
Usage
versionGLPK()
Details
Interface to the C function version which calls the GLPK
function glp_version.
Value
Returns a single character value containing the GLPK version number.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
Warm Up LP Basis
Description
Low level interface function to the GLPK function glp_warm_up.
Consult the GLPK documentation for more detailed information.
Usage
warmUpGLPK(lp)
Arguments
lp |
An object of class |
Details
Interface to the C function warmUp which calls the GLPK
function glp_warm_up.
Value
Status of “warming up”.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html
Write Interior-Point Solution to Text File
Description
Low level interface function to the GLPK function glp_write_ipt.
Consult the GLPK documentation for more detailed information.
Usage
writeIptGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function writeIpt which calls the GLPK
function glp_write_ipt.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
writeSolGLPK, printIptGLPK,
readIptGLPK, printMIPGLPK,
readMIPGLPK and writeMIPGLPK.
Write Problem Data in CPLEX LP Format
Description
Low level interface function to the GLPK function glp_write_lp.
Consult the GLPK documentation for more detailed information.
Usage
writeLPGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function writeLP which calls the GLPK
function glp_write_lp.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readMPSGLPK, readLPGLPK,
readProbGLPK,
writeMPSGLPK and writeProbGLPK.
Write MIP Solution to Text File
Description
Low level interface function to the GLPK function glp_write_mip.
Consult the GLPK documentation for more detailed information.
Usage
writeMIPGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function writeMIP which calls the GLPK
function glp_write_mip.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
writeSolGLPK, printIptGLPK,
readIptGLPK, writeIptGLPK,
printMIPGLPK and readMIPGLPK.
Write Problem Data in MPS Format
Description
Low level interface function to the GLPK function glp_write_mps.
Consult the GLPK documentation for more detailed information.
Usage
writeMPSGLPK(lp, fmt, fname)
Arguments
lp |
An object of class |
fmt |
MPS format. See |
fname |
The name of the text file to be written out. |
Details
Interface to the C function writeMPS which calls the GLPK
function glp_write_mps.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readMPSGLPK, readLPGLPK,
readProbGLPK,
writeLPGLPK, writeProbGLPK and
glpkConstants.
Write Problem Data in GLPK Format
Description
Low level interface function to the GLPK function glp_write_prob.
Consult the GLPK documentation for more detailed information.
Usage
writeProbGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function writeProb which calls the GLPK
function glp_write_prob.
Value
Returns zero on success, otherwise it returns non-zero and prints an error message.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
readMPSGLPK, readLPGLPK,
readProbGLPK,
writeLPGLPK and writeMPSGLPK.
Write Basic Solution to Text File
Description
Low level interface function to the GLPK function glp_write_sol.
Consult the GLPK documentation for more detailed information.
Usage
writeSolGLPK(lp, fname)
Arguments
lp |
An object of class |
fname |
The name of the text file to be written out. |
Details
Interface to the C function writeSol which calls the GLPK
function glp_write_sol.
Value
Returns zero on success, otherwise it returns non-zero.
Author(s)
Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
References
Based on the package glpk by Lopaka Lee.
The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.
See Also
printSolGLPK, readSolGLPK,
printIptGLPK, readIptGLPK,
writeIptGLPK, printMIPGLPK,
readMIPGLPK and writeMIPGLPK.