Aj 请问用R怎么把多行观测按个体转成一列,第二列为个体的id如: distance id 12 13 14 15 1 21 32 23 43 2 转成 distance id 12 1 13 1 14 1 15 1 21 2 32 2 23 2 43 2
Hydro library(tidyr) library(dplyr) df %>% gather(key, distance,-id) %>% select(-key) %>% arrange(id)