MN_MLE                  Matrix-normal maximum likelihood estimator
MatLDA                  Fits the J-class penalized matrix-normal model
                        for a single pair of tuning parameters.
MatLDA_Grid             Fits the J-class penalized matrix-normal model
                        for a two-dimensional grid of tuning
                        parameters. Used for tuning parameter
                        selection.
PredictMN               Classify matrix-valued data based on a
                        matrix-normal linear discriminant; an object of
                        class "MN".
