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如何在行名中生成括號?如何在行名中生成括號?
data.frame("gender"=c("man","woman"),"number(live in school)"=c(2340,1890))
gender number.live.in.school.
1 man 2340
2 woman 1890
我想要得到的格式輸出的是:
gender number(live in school)
1 man 2340
2 woman 1890