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Answers and rating deltas for

R data.table group by multiple columns into 1 column and sum

Author Votes Δ
Arun 7 +0.99
A5C1D2H2I1M1N2O1R2T1 6 +0.58
mucio 3 +0.06
Veerendra Gadekar 2 -0.62
PoGibas 2 -0.71
Frank 1 -1.11
Last visited: Jan 2, 2016, 5:41:52 PM