                        Methods to plot the verification plot of the
                        obtained optimal design.
                        Methods to print SW objects or the optimal
                        design and the efficiency from OPT objects.
Deff                    D-efficiency for 4-parameter logistic model.
MOPT                    Identify multiple-objective optimal designs for
                        estimating model parameters, ED50, MED.
OPT-class               Class to contain the results from function
                        MOPT, ceff1, ceff2, and Deff.
PAR-class               Class to contain the variables for the
                        verification plots from function MOPT, ceff1,
                        ceff2, and Deff.
S.Weight                Identify optimal weights for given dose levels.
SW-class                Class to contain the results from function S.
                        Weight.
VNM-package             Using V-algorithm and Newton-Raphson Method to
                        Obtain Multiple-objective Optimal Design.
ceff1                   Checking c-efficiency for estimating the ED50.
ceff2                   Checking c-efficiency for estimating the MED.
