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Answers and rating deltas for
How can I concatenate rows of a column in a matrix using another column as criteria
| Author | Votes | Δ |
|---|---|---|
| shmosel | 4 | +0.41 |
| user2100776 | 0 | -0.99 |
| bradimus | 0 | -1.22 |
| Piotr Wilkin | 0 | -1.09 |
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