View source: R/partial-factor.R
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.
partial_factor(levels = character())
Character vector of labels.
# Assert that `x` is a factor vec_assert(factor("x"), partial_factor()) # Testing with `factor()` is too strict, # because it tries to match the levels exactly # rather than learning them from the data. try(vec_assert(factor("x"), factor())) # You can also enforce a minimum set of levels try(vec_assert(factor("x"), partial_factor("y"))) vec_assert(factor(c("x", "y")), partial_factor("y")) pf <- partial_factor(levels = c("x", "y")) pf vec_ptype_common(factor("v"), factor("w"), .ptype = pf)
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