Choose and permute operators

Shorthand infix operators for common combinatorics: n %C% k gives the number of combinations ("n choose k"), and n %P% k gives the number of permutations ("n permute k").

Usage

n %C% k

n %P% k

Arguments

n

whole number (the n in "n choose/permute k")

k

whole number (the k in "n choose/permute k")

Value

A numeric value.

Author

Ben Wiseman, benjamin.h.wiseman@gmail.com

Examples

5 %C% 3 # 10  (5 choose 3)
#> [1] 10
5 %P% 3 # 60  (5 permute 3)
#> [1] 60