Re:A Gentle Visual Intro to Data Analysis in Python Using Pa...
by gjreda on Thursday November 01, 2018 @11:19AM
(#18354752)
I agree. Hadley Wickham (a very prolific author of important R libraries) wrote a great paper about this method using one of his libraries. I'm a Python + pandas user, but his paper really helped me understand the approach better: https://vita.had.co.nz/papers/plyr.pdf
Lots of data munging has been enabled or sped up by judicious application those concepts.
[0] https://pandas.pydata.org/pandas-docs/stable/groupby.html