The inverse of fct_explicit_na(). Turns the level into proper NA.
Retains the level.
Usage
fct_nanify(f, level, negate = FALSE, ignore_case = TRUE)
Arguments
- f
factor to work on
- level
character, regular expression matching the desired level
- negate
logical, whether to return non-matching elements. Defaults to
FALSE.
- ignore_case
logical, ignore case when matching? Defaults to TRUE.
Value
factor with NA-substituted level.
Examples
f <- factor(c("a", "b", "c", "nanify"))
fct_nanify(f, "nanify")
#>
#> ℹ Before coercing to integer, make sure the level you have just NAnified is the last one, so no number is skipped!
#> This message is displayed once per session.
#> [1] a b c <NA>
#> Levels: a b c nanify
