Unless otherwise stated, the source code of the permute package is
copyright (C) Gavin L. Simpson 2010 - 2013.

One exception is the code for the `update.how` and `update.Plots` S3
methods in files

PKG_BASE/R/update.how.R
PKG_BASE/R/update.Plots.R

These functions are based upon code from the `update.default` method of
base R. These are Copyright (C) 1995-2012 The R Core Team. These codes
are released under the GPL version 2 or, at your discretion, any later
version.

The full copyright and licence statements for these codes are retained
in the header of the respective .R files listed above.