Provide formatter for labeling categories in cut function

[greimel]

This is something I find useful. One could even add the group index as an additional argument.

Is this something that is worth adding?

e.g.

using Random, CategoricalArrays
data = rand(100)
cut(data, 10, label_formatter = (from,to;extend=true) -> string("P",Int(round(100 * parse(Float64,from),digits=0)),"P",Int(round(100 * parse(Float64,to), digits=0))))
# 100-element CategoricalArray{String,1,UInt32}:
# "P51P57" 
# "P16P26" 
# ...

[nalimilan]

Thanks, sounds useful. Though I'd just use the labels argument, as we can do something different when it's a function rather than an array of names.

[nalimilan]

Ah, and can you add a test?

[greimel]

updated and improved

EDIT: shall I rebase?

[nalimilan]

A few more comments.

[nalimilan]

Is this actually needed? There's probably a way to avoid it as it takes a lot of space.

[greimel]

Could you please clarify what you mean by "this"

[nalimilan]

I mean this using line.

[greimel]

thanks - I dropped it. Let's see what CI says

[nalimilan]

I mean this using line.

[nalimilan]

Thanks!