R语言 数据集取子集

保留变量：sql >newdata<-leadership[,c(6:10)]                       或者函数 > myvars<-c("item1","item2","item3","item4","item5") > newdata<-leadership[myvars] 丢弃变量：code > myvars<-names(leadership)%in%c("item3"

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