canonicalSVD            singular value decomposition
cv_all                  calculate the CV optimal beta
cv_screen               calculate the CV optimal beta and estimated
                        support set
hittingpoint            hitting point calculator on a given path
normc                   default normalization function for matrix
select                  split knockoff selector given W statistics
sk.W_fixed              W statistics generator based on a fixed
                        beta(lambda) = hat beta
sk.W_path               W statistics generator based on the
                        beta(lambda) from a split LASSO path
sk.create               generate split knockoff copies
sk.decompose            make SVD as well as orthogonal complements
sk.filter               split Knockoff filter for structural sparsity
                        problem
threshold               compute the threshold for variable selection
