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Answers and rating deltas for

is there a way in R to subtract two rows within a group by specifying another grouping var?

Author Votes Δ
akrun 2 +0.69
Khaynes 0 -1.50
BigFinger 0 -1.25
ThomasIsCoding 0 -0.34
Last visited: May 14, 2020, 3:16:00 AM