Combine Factor Levels — combine_levels • tern

Combine specified old factor Levels in a single new level.

Usage

combine_levels(x, levels, new_level = paste(levels, collapse = "/"))

Arguments

x: factor
levels: level names to be combined
new_level: name of new level

Value

a factor

Examples

x <- factor(letters[1:5], levels = letters[5:1])
combine_levels(x, levels = c("a", "b"))
#> [1] a/b a/b c   d   e  
#> Levels: e d c a/b

combine_levels(x, c("e", "b"))
#> [1] a   e/b c   d   e/b
#> Levels: e/b d c a