Partially specify a factor

This special class can be passed as a ptype in order to specify that the result should be a factor that contains at least the specified levels.

Usage

partial_factor(levels = character())

Arguments

levels

Character vector of labels.

Examples

pf <- partial_factor(levels = c("x", "y"))
pf
#> partial_factor<
#>   5ec15 {partial}
#> >

vec_ptype_common(factor("v"), factor("w"), .ptype = pf)
#> factor()
#> Levels: v w x y