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).
