Simpler and faster version of expand.grid() in base package
expand(elem)
Arguments
elem |
list of elements to be combined |
Examples
#> [[1]]
#> [1] "a" "x"
#>
#> [[2]]
#> [1] "b" "x"
#>
#> [[3]]
#> [1] "c" "x"
#>
#> [[4]]
#> [1] "a" "y"
#>
#> [[5]]
#> [1] "b" "y"
#>
#> [[6]]
#> [1] "c" "y"
#>