ord_collapse: Compress integer ordinal factors with too many levels
In anchorlytics/anchorUtils: Helper functions for workflow

Description Usage Arguments Value See Also Examples

Polychoric correlation routines often limit the number of levels an ordinal (ordered categorical) factor can have. This function is like forcats::fct_collapse() but preserves the ordering of levels. Modified factors are releveled to 1:n.

1	ord_collapse(.data, maxlev = 10, newlev = maxlev)

`.data`	data frame with ordinal factors coded as integers
`maxlev`	apply level collapsing only if `nlevels` is greater than this
`newlev`	if collapsing levels, how many levels should the factor have. Default is `maxlev`.

data frame with same columns

Other data munging: drop_nzv(), dummy_code()

library(dplyr)
mtcars %>%
  mutate(across(c("cyl", "vs", "am", "gear", "carb", "disp"), as.ordered)) %>%
  ord_collapse() %>%
  summarise_all(nlevels)