Validate level names

A level name must be a non-empty, non-NA string that is a syntactically valid R name (so it can be used as a data.frame column without quoting).

Usage

is_valid_level(x)

Arguments

x

Character vector of candidate level names.

Value

A logical vector the same length as x.

Examples

is_valid_level(c("COUNTRY", "reg32", "", "2bad"))
#> [1]  TRUE  TRUE FALSE FALSE