Enhance semantics of prop in fct_lump()

[tidyverse]

Enhance semantics of prop in fct_lump()

[hadley]

I don't like using prop in that way - it's starting to add too many meanings to a single argument, which I think makes it confusing. I'd rather add another argument or possible create another function.

[vspinu]

I'd rather add another argument or possible create another function.

count might be a reasonable name for the new argument. Thus, n is for most/least common n levels, count for levels with at least/at most counts, and prop for least/most common fraction.

Another function is an overkill IMO.

[akaEmma]

Any progress on this?

[ksedivyhaley]

I am also very interested in this feature.

In the meantime, I seem to have an ugly workaround. If I want to eg group items with over 2 occurrences:

#get the number of levels with more than 2 occurences

over_2 <-  sum( (count(  group_by(data, factor) ))$n>2 )

#plug this into fct_lump

data %>%
  mutate(factor = fct_lump(factor, n = over_2)

[hadley]

I'm pretty sure this is fct_lump_min()