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Answers and rating deltas for

How do I replace NA in one column if another column's value is greater than 0?

Author Votes Δ
Sven Hohenstein 4 +1.85
A5C1D2H2I1M1N2O1R2T1 3 +0.54
juba 1 -1.89
Last visited: Sep 14, 2014, 5:07:29 AM