Change factor levels by hand
fct_recode(.f, ...)A factor (or character vector).
<dynamic-dots> A sequence of named character
vectors where the name gives the new level, and the value gives the old
level. Levels not otherwise mentioned will be left as is. Levels can
be removed by naming them NULL.
x <- factor(c("apple", "bear", "banana", "dear"))
fct_recode(x, fruit = "apple", fruit = "banana")
#> [1] fruit bear fruit dear
#> Levels: fruit bear dear
# If you make a mistake you'll get a warning
fct_recode(x, fruit = "apple", fruit = "bananana")
#> Warning: Unknown levels in `f`: bananana
#> [1] fruit bear banana dear
#> Levels: fruit banana bear dear
# If you name the level NULL it will be removed
fct_recode(x, NULL = "apple", fruit = "banana")
#> [1] <NA> bear fruit dear
#> Levels: fruit bear dear
# Wrap the left hand side in quotes if it contains special variables
fct_recode(x, "an apple" = "apple", "a bear" = "bear")
#> [1] an apple a bear banana dear
#> Levels: an apple banana a bear dear
# When passing a named vector to rename levels use !!! to splice
x <- factor(c("apple", "bear", "banana", "dear"))
levels <- c(fruit = "apple", fruit = "banana")
fct_recode(x, !!!levels)
#> [1] fruit bear fruit dear
#> Levels: fruit bear dear