all_pairs function

Create all possible pairs

Create all possible pairs of two character vectors.

all_pairs(x, y = character(0), sort = FALSE, result = "matrix")

names2pairs(x, y = NULL, sort = TRUE, result = "list")

Arguments

• x, y: Character vectors.
• sort: Logical.
• result: A list or a matrix.

Details

NOTICE: If y is not NULL then x and y must be disjoint (no checks are made); otherwise pairs of identical elements wil also be obtained.

Examples

x <- letters[1:4]
y <- letters[5:7]

all_pairs(x)
all_pairs(x, result="matrix")

all_pairs(x, y)
all_pairs(x, y, result="matrix")

Author(s)

Søren Højsgaard, sorenh@math.aau.dk