crossvalidation         Perform cross validation to select the
                        regularization parameter.
elasticNet              Auxiliary function which returns the objective,
                        penalty, and dependence structure among
                        regression coefficients of the elastic net.
fusedLasso              Auxiliary function which returns the objective,
                        penalty, and dependence structure among
                        regression coefficients of the fused Lasso.
graphicalLasso          Auxiliary function which returns the objective,
                        penalty, and dependence structure among
                        regression coefficients of the graphical Lasso.
minimizeFunction        Minimize the objective function of an
                        unsmoothed or smoothed regression operator with
                        respect to betavector using BFGS.
minimizeSmoothedSequence
                        Minimize the objective function of a smoothed
                        regression operator with respect to betavector
                        using the progressive smoothing algorithm.
objFunction             Auxiliary function to define the objective
                        function of an L1 penalized regression
                        operator.
objFunctionGradient     Auxiliary function which computes the
                        (non-smooth) gradient of an L1 penalized
                        regression operator.
objFunctionSmooth       Auxiliary function to define the objective
                        function of the smoothed L1 penalized
                        regression operator.
objFunctionSmoothGradient
                        Auxiliary function which computes the gradient
                        of the smoothed L1 penalized regression
                        operator.
prsLasso                Auxiliary function which returns the objective,
                        penalty, and dependence structure among
                        regression coefficients of the Lasso for
                        polygenic risk scores (prs).
standardLasso           Auxiliary function which returns the objective,
                        penalty, and dependence structure among
                        regression coefficients of the Lasso.
