Implements a set of restricted permutation designs for freely exchangeable, line transects (time series), and spatial grid designs plus permutation of blocks (groups of samples). ‘permute’ also allows split-plot designs, in which the whole-plots or split-plots or both can be freely-exchangeble or one of the restricted designs. The permute package is modelled after the permutation schemes of Canoco 3.1 by Cajo ter Braak.