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Answers and rating deltas for
how to perform sum and count on dataframe in R
| Author | Votes | Δ |
|---|---|---|
| G. Grothendieck | 6 | +1.00 |
| akrun | 4 | +0.53 |
| M-- | 2 | -1.07 |
| maop | 2 | -1.95 |
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