Combine several variables in one key (multi-level wave or filter)

Used when var_wave (or var_filter) contains more than one variable in the configuration file, for example the year and the quarter. The complete key of a row is then "2024 / T1".

Usage

combine_vars(df, vars, sep = " / ")

Arguments

df

data.frame

vars

vector of the variable of each level

sep

separator between the levels

Value

vector of the complete keys

Examples

head(combine_vars(mtcars,c("cyl","gear")))
#> [1] "6 / 4" "6 / 4" "4 / 4" "6 / 3" "8 / 3" "6 / 3"