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How can I normalize each column value by the sum of its column with data.table library?
| Author | Votes | Δ |
|---|---|---|
| zacdav | 3 | +1.89 |
| chinsoon12 | 3 | +1.14 |
| www | 1 | -1.38 |
Last visited: Aug 17, 2018, 5:35:05 AM