Make missing values explicit

Description

This gives missing value an explicit factor level, ensuring that they appear in summaries and on plots.

Usage

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fct_explicit_na(f, na_level = "(Missing)")

Arguments

f

A factor.

na_level

Level to use for missing values.

Examples

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f1 <- factor(c("a", "a", NA, NA, "a", "b", NA, "c", "a", "c", "b"))
table(f1)

f2 <- fct_explicit_na(f1)
table(f2)