Split interaction terms into their component variables

Usage

split_interactions(x, by = "\\*|:")

Arguments

x

(character)
string representing the interaction usually in the form x:y or x*y.

by

(character)
regex with which to split the interaction term by.

Value

a vector of strings where each element is a component variable extracted from interaction term x.

Examples

split_interactions("x:y")
#> [1] "x" "y"
split_interactions("x*y")
#> [1] "x" "y"