define behavior of `transform_vec` and friends

Open piever opened this issue 7 years ago • 2 comments

Decide which columnwise operations should accept an optional grouping argument. Also clarify what happens for the distributed case (use the groupby implementation for the case by == ()).

Mar 14 '18 18:03 piever

Related to this, think how to handle "grouped data".

Mar 14 '18 21:03 piever

Similarly, see if it's easy to implement usekey behavior generally when grouping.

Mar 15 '18 14:03 piever