Check nlevels

Checks the number of levels of an object.

check_nlevels(x, nlevels = TRUE, x_name = substitute(x), error = TRUE)

Arguments

x

The data to check.

nlevels

A flag indicating whether x should have elements (versus no elements) or a missing value indicating no requirements or a count or count range of the number of elements.

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_levels and check_vector

Examples

check_nlevels(factor(1), error = FALSE)
#> Warning: `check_nlevels()` was deprecated in checkr 0.5.1.
#> Please use `chk::check_dim()` instead.
check_nlevels(factor(1), nlevels = 2, error = FALSE)
#> Warning: `check_nlevels()` was deprecated in checkr 0.5.1.
#> Please use `chk::check_dim()` instead.
#> Warning: factor(1) must have 2 levels