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Answers and rating deltas for

Is there a quick way to get the mean of various "bins" of a column in a dataframe?

Author Votes Δ
eddi 2 +4.07
IRTFM 1 +0.13
Ken Butler 0 -2.50
Quentin Geissmann 0 -2.61
Last visited: Sep 14, 2014, 5:07:29 AM