PCGII                   Get the estimated partial correlation graph
                        with information incorporation
clevel                  Get the estimated partial correlation graph
                        without information incorporation
inference               Conduct simultaneous inference of estimated
                        partial correlations
makeBlockDiag           Generate block-diagonal matrix of size p by p
make_random_precision_mat
                        Generate unstructured/random network skeleton
                        and simulates corresponding precision matrix
make_sf_precision_mat   Generate scale-free network skeleton and
                        simulates corresponding precision matrix
sigs2mat                Utility function for PCGII inference results
undirected_prior        Pre-process the input prior set to ensure the
                        input prior set corresponds to an undirected
                        prior network
