Export label and level: multiple variable
Examples
mk.lev(iris)
#> variable class level var_label val_label
#> <char> <char> <char> <char> <char>
#> 1: Sepal.Length numeric <NA> Sepal.Length <NA>
#> 2: Sepal.Width numeric <NA> Sepal.Width <NA>
#> 3: Petal.Length numeric <NA> Petal.Length <NA>
#> 4: Petal.Width numeric <NA> Petal.Width <NA>
#> 5: Species factor setosa Species setosa
#> 6: Species factor versicolor Species versicolor
#> 7: Species factor virginica Species virginica