StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
Is there a way in data.table to assign ID's by group based upon an identifier?
| Author | Votes | Δ |
|---|---|---|
| Arun | 6 | +0.31 |
| Steven Beaupré | 2 | -2.50 |
Last visited: Jan 2, 2016, 3:59:50 AM