The translations of a side x side torus combined with the eight
symmetries of the square keep all distances among sites, and therefore the
spatial autocorrelation of the environment. They give a restricted null
model for spatially explicit metacommunities (see the vignette).
Arguments
- side
Number of cells per side, as in
landscape_grid().
Value
Integer matrix with one permutation of the site indices per row,
excluding the identity (8 * side^2 - 1 rows when side > 2).
Examples
p <- torus_permutations(4)
dim(p)
#> [1] 127 16