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取子集+赋值
k1 = rnorm(12)
k2 = rep(c("a","b","c","d"),each = 3)
plot(k1)
boxplot(k1~k2)
进阶小问题的答案—
[图片上传失败...(image-c09fdc-1589123868052)]
取子集+赋值
k1 = rnorm(12)
k2 = rep(c("a","b","c","d"),each = 3)
plot(k1)
boxplot(k1~k2)
进阶小问题的答案—