Enumerate the Combinations or Permutations of the Elements of a Vector

permutations enumerates the possible permutations. The function is forked and minified from gtools::permutations

Usage

permutations(n, r, v = 1:n)

Arguments

n

Size of the source vector

r

Size of the target vectors

v

Source vector. Defaults to 1:n

Value

Returns a matrix where each row contains a vector of length r.

References

Venables, Bill. "Programmers Note", R-News, Vol 1/1, Jan. 2001. https://cran.r-project.org/doc/Rnews/

See also

Other Helper Functions: dup_coords(), getDEM(), getISO3(), get_grids(), grid_area(), hexa_area(), isSpatial(), readintegerSel(), readinteger(), splitAt(), windata_format()

Author

Original versions by Bill Venables. Extended to handle repeats.allowed by Gregory R. Warnes