Eric Ma

@mtfairbanks thanks for raising these good points! This issue definitely is the first overview of the multitude of ways to add columns to a dataframe. Let me address your points...

@mtfairbanks thanks for the detail up there! Let me see, I think I have some ideas. > FYI - I know the pandas API well enough to get the job...

@mdini if you'd like to take on this issue, please let us know here!

Awesome stuff! Just marked this as being worked on. Thank you for all of your contributions :smile:.

> But why do we have transform_column then? @mdinin this was a design choice I made early on, which in retrospect may not have been the best. I had created...

@samukweku it's an important API decision. What's your thought?

Sounds good. This is a breaking change for the API, btw, so be sure to follow "deprecation practices". If I remember correctly, @hectormz put in a decorator for deprecating stuff....

If I am reading the pandas docs correctly, I think transform only operates on the entire dataframe. Does it allow selective column transformations?

Cool stuff! Thanks @samukweku for figuring this out 😄 🎉! With `transform_column`, looks like we're covering the case where we want to selectively transform a bunch of columns _while retaining...

Yep, definitely @samukweku! I posted something [here](https://gist.github.com/ericmjl/1798670fc227bcea1714ad3c2e657824). Please let me know what you think of it! cc: @sallyhong