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Answers and rating deltas for
How can I sum values in a column, grouped by names in rows in R, without listing each name?
| Author | Votes | Δ |
|---|---|---|
| Matthew Lundberg | 5 | +4.71 |
| A5C1D2H2I1M1N2O1R2T1 | 4 | -0.29 |
Last visited: Sep 14, 2014, 5:07:29 AM