BayesTreePrior          Simulation of the tree prior.
BayesTreePriorNotOrthogonal
                        Simulation of the tree prior in the general
                        case (Case #4).
BayesTreePriorOrthogonal
                        Simulation of the tree prior in the case where
                        we have one single variable (Case #3).
BayesTreePriorOrthogonalInf
                        Simulation of the tree prior in the unrealistic
                        case where we assume that the number of
                        variables and possible splits are infinite
                        (therefore P(T) is not dependent on the design
                        matrix X) (Case #2).
E_alpha                 Expected value of the number of bottom nodes in
                        the unrealistic case where we assume that the
                        number of variables and possible splits are
                        infinite (therefore P(T) is not dependent on
                        the design matrix X) and beta=0 (Case #1).
GetListUniqueSplits     Unique splits that leads to children with more
                        than minpart nodes.
NumBotMaxDepth          Number of bottom nodes and depth in the case
                        where we have one single variable (Case #3).
NumBotMaxDepthX         Number of bottom nodes and depth in the general
                        case (Case #4).
NumBotMaxDepth_inf      Number of bottom nodes and depth in the
                        unrealistic case where we assume that the
                        number of variables and possible splits are
                        infinite (therefore P(T) is not dependent on
                        the design matrix X) (Case #2).
Var_alpha               Variance of the number of bottom nodes in the
                        unrealistic case where we assume that the
                        number of variables and possible splits are
                        infinite (therefore P(T) is not dependent on
                        the design matrix X) and beta=0 (Case #1).
p_split                 Probability of split of the tree prior.
