fct_drop | R Documentation |
Compared to base::droplevels()
, does not drop NA
levels that have values.
fct_drop(f, only = NULL)
f |
A factor (or character vector). |
only |
A character vector restricting the set of levels to be dropped. If supplied, only levels that have no entries and appear in this vector will be removed. |
fct_expand()
to add additional levels to a factor.
f <- factor(c("a", "b"), levels = c("a", "b", "c")) f fct_drop(f) # Set only to restrict which levels to drop fct_drop(f, only = "a") fct_drop(f, only = "c")
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