PCAgrid                 (Sparse) Robust Principal Components using the
                        Grid search algorithm
PCAproj                 Robust Principal Components using the algorithm
                        of Croux and Ruiz-Gazen (2005)
PCdiagplot              Diagnostic plot for principal components
ScaleAdv                centers and rescales data
cor.fk                  Fast estimation of Kendall's tau rank
                        correlation coefficient
covPC                   Covariance Matrix Estimation from princomp
                        Object
covPCAproj              Robust Covariance Matrix Estimation
data.Zou                Test Data Generation for Sparse PCA examples
l1median                Multivariate L1 Median
l1median_NLM            Multivariate L1 Median
objplot                 Objective Function Plot for Sparse PCs
opt.TPO                 Model Selection for Sparse (Robust) Principal
                        Components
plot.opt.TPO            Tradeoff Curves for Sparse PCs
plotcov                 Compare two Covariance Matrices in Plots
qn                      scale estimation using the robust Qn estimator