step_dummy: separator option for naming

[mdancho84]

Max,

Loving working with this package. One thing I run into from time to time is to associate the dummy variable with the original variable name. It might make things easier if you include a separator option similar to stringr::str_c(sep = "_") for the step_dummy() function.

It would make it easy to str_split() the base name from the appended dummy piece of the name.

Let me know if you agree.

Thanks, Matt

[topepo]

Would the names argument to step_dummy solve this? It defaults to:

recipes::dummy_names <- function (var, lvl, ordinal = FALSE) {
    if (!ordinal) 
        nms <- paste(var, make.names(lvl), sep = "_")
    else nms <- paste0(var, names0(length(lvl), "_"))
    nms
}

but you could pass your own function.

[topepo]

Should I close this? Does it work for you?

[mdancho84]

Sorry, I missed this in my email. If we could access the sep = "_" as an argument to recipes::dummy_names and then connect that to the step_dummy() function either as a explicit argument or passed as ... to the underlying function. That would be ideal.

[mdancho84]

I can work up a PR hopefully next week. With Jonathan at S&P this week. Also congrats on the Davis hire. He's a great add, and he'll be a big benefit to your team.

[topepo]

That's simple enough; done.

Yeah, Davis is great. I feel like we have 4 people instead of 2.5.

[mdancho84]

Awesome man! Appreciate it. That's going to make Correlation Funnels much easier. hehe

Yeah, your team's productivity just skyrocketed.

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