Make variables where all choices are numeric into class numeric

[sfirke]

Currently character. Low priority.

[sfirke]

Use this? https://stackoverflow.com/a/13638403

[sfirke]

It was easy to implement here: c27f1fb#diff-aefe1936aed0769d26de737a9fec03f3R102-R103

But I'm not going to merge without others chiming in. Because if it truly should be treated as a factor - in particular, if the asked-but-not-selected missing levels are meaningful - they'll be lost. That's irretrievable. On the other hand, to make the factor into a numeric is simply as.numeric(as.character(x)). So even if the numeric result is usually preferable, keeping it as a factor feels safer.

[sfirke]

If this is implemented, it should only be as an option with the default being factors. And I'm smiling at the idea of a user typing numbersAsFactors = FALSE 😉

[sfirke]

Make this sm_-something, like sm_unfactorize_numbers. This function should have tests, if implemented.

[sfirke]

I considered this here: sfirke/janitor#447 and decided readr::type_convert was perfectly good already. Could use that if this feature is implemented.