ADMM                    Penalized Optimization Framework for Community
                        Detection in Networks with Covariates.
CASC                    Covariate Assisted Spectral Clustering.
CASCORE                 Covariate Assisted Spectral Clustering on
                        Ratios of Eigenvectors.
Cov_based               Covariates-based Clustering.
Net_based               Network-based Clustering.
SCORE                   Spectral Clustering On Ratios-of-Eigenvectors.
nPCA                    Normalized Principle Component Analysis.
oPCA                    Ordinary Principle Component Analysis.
