Created
June 23, 2014 23:32
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data.tableをinner_joinするとdata.frameになって困る?
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| library(data.table) | |
| library(dplyr) | |
| dt1 = data.table(x = 1, y = 1) | |
| dt2 = data.table(x = 1, z = 1) | |
| dt1 %>% inner_join(dt2, by = "x") | |
| # x y z | |
| #1 1 1 1 | |
| dt1 %>% inner_join(dt2, by = "x") %>% class | |
| # [1] "data.frame" |
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data.tableどうしをinner_joinで結合したらdata.frameになっている.
ずっとdata.tableでいて欲しいですよね.