checkerboardDensity     Estimate the checkerboard mass density
checkerboardDensityIndex
                        Estimate a single entry of the checkerboard
                        mass density
computeBandwidth        Compute bandwidth via cross-validation
computeCBMeasure        Dependence measures for the checkerboard copula
rdm                     Rearranged dependence measure
sortDSMatrix            Sort a (possibly non-square) doubly stochastic
                        matrix
