我有2个data.tables:
library(data.table)
dt1 <- data.table(id = 1:5, value1 = 11:15, value2 = 21:25, value3 = 36:40)
dt2 <- data.table(name = c("value1", "value1", "value1", "value1",
"value2", "value2", "value2", "value3", "value3"),
valueMin = c(10, 13, 14, 18, 21, 24, 25, 36, 38),
valueMax = c(13, 14, 18, 20, 24, 25, 27, 38, 42),
label = c(101:104, 201:203, 301:302))
> dt1
id value1 value2 value3
1: 1 11 21 36
2: 2 12 22 37
3: 3 13 23 38
4: 4 14 …