Check variables are of same levels

Usage

assert_valid_var_pair(
  df1,
  df2,
  var,
  lab1 = deparse(substitute(df1)),
  lab2 = deparse(substitute(df2))
)

Arguments

df1

(data.frame) input.

df2

(data.frame) input.

var

(string) variable to check.

lab1

(string) label hint for df1.

lab2

(string) label hint for df2.

Value

invisible NULL or an error message if the criteria are not fulfilled.