CorrMat                 The Function for Constructing the Correlation
                        Matrix in 'GPM' Package
Draw                    The Plotting Function of 'GPM' Package
Fit                     The Fitting Function of 'GPM' Package
NLogL                   The Function for calculating the Negative
                        Log-Likelehood in 'GPM' Package
Predict                 The Prediction Function of 'GPM' Package
