RandomPartition[n] constructs a random partition of integer n.
RandomPermutation[n] generates a random permutation of the first n natural numbers.
RandomTableau[p] constructs a random Young tableau of shape p.
RandomTree[n] constructs a random labeled tree on n vertices.
RankGraph[g, l] partitions the vertices into classes based on the shortest geodesic distance to a member of list l.
RankPermutation[p] gives the rank of permutation p in lexicographic order.
RankRGF
(Combinatorica Package Symbol) RankRGF[f] returns the rank of a restricted growth function (RGF) f in the lexicographic order of all RGFs.
RankSubset[l, s] gives the rank, in canonical order, of subset s of set l.
ReadGraph[f] reads a graph represented as edge lists from file f and returns a graph object.
RealizeDegreeSequence[s] constructs a semirandom graph with degree sequence s.