MISE                    Approximate Mean Integrated Squared Error
SecondDerivativePenalty
                        A Roughness Penalty Based on the Squared Second
                        Derivative
d                       A really neat data set
lambda                  Penalty Parameter Selector
numericalDerivative     Numerical Derivative of Smooth Function
penlocreg               Penalized Local Polynomial Regression
pllr                    Penalized Local Linear Regression
sharp1d                 Data Sharpening for Density Estimation
sharp2d                 Identify Cluster Centres for 2-dimensional Data
                        via Data Sharpening
sharp3d                 Identify Cluster Centres for 3-dimensional Data
                        via Data Sharpening
sharp3dB                Identify Cluster Centres for 3-dimensional Data
                        via Data Sharpening
sharpen                 Penalized Data Sharpening Operator for Local
                        Polynomial Regression
