R語言subset和merge函數的使用

一、merge函數對數據框的操做，從兩個數據框中選擇出條件相等的行組合成一個新的數據框 df1=data.frame(name=c("aa","bb","cc"),age=c(20,29,30),sex=c("f","m","f")) df2=data.frame(name=c("dd","bb","cc"),age=c(40,35,36),sex=c("f","m","f")) mergedf=

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