Make unique variable names

Helper function to create new variable names that are unique given a set of existing names (in a data set, for example). If a variable name already exists, a number will be appended.

Usage

unique_names(new, existing = character())

Arguments

new

a vector of proposed new variable names

existing

a vector of existing variable names

Value

a vector of unique new variable names

Examples

unique_names(c("var_x", "var_y", "var_x"), c("var_x", "var_z"))
#> [1] "var_x_1" "var_y"   "var_x_2"