AnchorFree              Non-negative tri-factorization of co-occurence
                        matrix using minimum volume approach.
factor_intensities      Infer a matrix of non-negative intensities in
                        NMF with offset/nmf-offset.
infer_intensities       Infer a matrix of non-negative intensities in
                        NMF
projection_onto_simplex
                        Project vector onto a probabilistic simplex.
sim_factors             Simulate matrices to explores 'vrnmf'
vol_preprocess          Preprocess the data for downstream volume
                        analysis.
volnmf_det              Update volume-regularized matrix 'R' using det
                        volume approximation
volnmf_estimate         Alternating optimization of volume-regularized
                        NMF
volnmf_logdet           Update volume-regularized matrix 'R' using
                        logdet volume approximation.
volnmf_main             Volume-regularized NMF
volnmf_procrustes       Procrustes algorithm estimates orthonormal
                        transformation between two matrices.
volnmf_simplex_col      Update of a matrix in NMF with equality
                        contstraints on columns.
volnmf_simplex_row      Update of a matrix in NMF with equality
                        contstraints on rows.
