Function reference • forcats

Change order of levels Keep the values of the levels the same, but change their order. These are particularly useful for models, tables, and visualisations.
`fct_relevel()`	Reorder factor levels by hand
`fct_inorder()` `fct_infreq()` `fct_inseq()`	Reorder factors levels by first appearance, frequency, or numeric order.
`fct_reorder()` `fct_reorder2()` `last2()`	Reorder factor levels by sorting along another variable
`fct_shuffle()`	Randomly permute factor levels
`fct_rev()`	Reverse order of factor levels
`fct_shift()`	Shift factor levels to left or right, wrapping around at end
Change value of levels Change factor levels, while preserving order (as much as possible).
`fct_anon()`	Anonymise factor levels
`fct_collapse()`	Collapse factor levels into manually defined groups
`fct_lump()` `fct_lump_min()`	Lump together least/most common factor levels into "other"
`fct_other()`	Replace levels with "other"
`fct_recode()`	Change factor levels by hand
`fct_relabel()`	Automatically relabel factor levels, collapse as necessary
Add/remove levels Leave existing data as is, but add or remove levels.
`fct_expand()`	Add additional levels to a factor
`fct_explicit_na()`	Make missing values explicit
`fct_drop()`	Drop unused levels
`fct_unify()`	Unify the levels in a list of factors
Combine multiple factors
`fct_c()`	Concatenate factors, combining levels
`fct_cross()`	Combine levels from two or more factors to create a new factor
Other helpers
`as_factor()`	Convert input to a factor.
`fct_count()`	Count entries in a factor
`fct_match()`	Test for presence of levels in a factor
`fct_unique()`	Unique values of a factor
`lvls_reorder()` `lvls_revalue()` `lvls_expand()`	Low-level functions for manipulating levels
`lvls_union()`	Find all levels in a list of factors
Data
`gss_cat`	A sample of categorical variables from the General Social survey

Reference

Change order of levels

Change value of levels

Add/remove levels

Combine multiple factors

Other helpers

Data

Contents