Check Levels

Checks the levels in a factor including the order and whether other levels are permitted.

check_levels(
  x,
  levels,
  exclusive = TRUE,
  order = TRUE,
  x_name = substitute(x),
  error = TRUE
)

Arguments

x

The object to check.

levels

A character vector of the levels.

exclusive

A flag indicating whether other levels are not permitted.

order

A flag indicating whether the object levels have to occur in the same order as names. To check whether x is an ordered factor use check_vector(x, ordered(1)).

x_name

A string of the name of the object x.

error

A flag indicating whether to throw an informative error or immediately generate an informative message if the check fails.

Value

An invisible copy of x (if it doesn't throw an error).

See also

check_nlevels and check_vector

Examples

check_levels(1, c("x", "y"), error = FALSE)
#> Warning: `check_levels()` was deprecated in checkr 0.5.1.
#> Please use `chk::check_data()` instead.
#> Warning: 1 must have a levels attribute
#> Warning: 1 levels must be identical to 'x' and 'y'
check_levels(factor(1), c("x", "y"), error = FALSE)
#> Warning: `check_levels()` was deprecated in checkr 0.5.1.
#> Please use `chk::check_data()` instead.
#> Warning: factor(1) levels must be identical to 'x' and 'y'