Jinseob Kim jinseob2kim
pimentel
/ data.table_roll-nearest.R
Last active
March 16, 2022 07:06
examples of rolling join in data.table
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| DT1 <- data.table(x = 1:5) | |
| DT2 <- data.table(y = (1:5) + 0.01) | |
| setkey(DT1, x) | |
| setkey(DT2, y) | |
| # the following does not maintain both columns | |
| DT1[DT2, roll = 'nearest'] | |
| # x | |
| # 1: 1 | |
| # 2: 2 |