Auxil                   An auxiliary function used in calculating the
                        negative log-likelehood and its gradient
CorrMat_Sym             Two Functions for Constructing the Correlation
                        Matrix in 'GPM' Package
Draw                    The Plotting Function of 'GPM' Package
Eigen                   A Set of Functions for Doing Some Calculations
                        on Matrices in 'GPM' Package
Fit                     The Fitting Function of 'GPM' Package
NLogL                   The Function for calculating the Negative
                        Log-Likelehood in 'GPM' Package
NLogL_G                 The Function for calculating the gradient of
                        Negative Log-Likelehood in 'GPM' Package
Predict                 The Prediction Function of 'GPM' Package
