permutations: Permutations
Description
This function enumerates the possible permutations. See help("permutations") from package gtools.source
Gregory R. Warnes. Includes R source code and/or documentation contributed by Ben Bolker and Thomas Lumley (2010). gtools: Various R programming tools. R package version 2.6.2. http://CRAN.R-project.org/package=gtools