我的重新编码尝试
df$test[(df$1st==(1:3) & df$2nd <= 4)] <- 1
df$test[(df$1st==(1:3) & df$2nd <= 5)] <- 2
df$test[(df$1st==(1:3) & df$2nd <= 6)] <- 3
导致"longer object length is not a multiple of shorter object length"警告和大量的NA以s df$test,即使一些重新编码正常工作.
我错过了什么？任何帮助赞赏.
DW
r ×1