CLRMC                   Takes an incomplete matrix and returns the
                        imputed matrix using CLRMC method.
ECLRMC                  Takes an incomplete matrix and returns the
                        imputed matrix using ECLRMC method.
LRMC                    Takes an incomplete matrix and returns the
                        imputed matrix using LRMC method.
NRMS                    Normalized Root Mean Square (NRMS) value of two
                        matrices for evaluating their similarity (lower
                        is better)
