Random Permutation — randperm • pracma

Generates a random permutation.

randperm(a, k)

Arguments

a: integer or numeric vector of some length n.
k: integer, smaller as a or length(a).

Details

Generates one random permutation of k of the elements a, if a is a vector, or of 1:a if a is a single integer.

Value

Vector of permuted elements of a or 1:a.

Note

This behavior is different from Matlab/Octave, but does better correspond with the behavior of the perms() function.

See also

Examples

randperm(1:6, 3)
#> [1] 3 2 5
randperm(6, 6)
#> [1] 5 3 2 4 6 1
randperm(11:20, 5)
#> [1] 13 20 15 11 17
randperm(seq(2, 10, by=2))
#> [1]  4 10  2  8  6