combn                    Generate all combinations of the elements of x
                         taken m at a time.
dmnom                    density of multinomial, and support functions
hcube                    Generate all points on a hypercuboid lattice.
nsimplex                 Computes the number of points on a (p, n)-
                         simplex lattice
permn                    Generates all permutations of the elements of x
rmultinomial             Generate random samples from multinomial
                         distributions
x2u                      Convert an x-encoded simplex-lattice point to a
                         u-encoded simplex-lattice point
xsimplex                 Generates all points on a (p,n) simplex lattice
                         (i.e. a p-part composition of n).
