两个不同的数据集哪个变量不同？

Question

所以我有两个不同的数据集（df_test和df_test_2），我希望能够区分它们之间的区别。我知道我可以使用setdiff来区分它们之间的区别，但是我需要知道它们之间的区别。例如，我要查看var_1不同且其他所有内容都相同的行，并且我还想对var_2和所有其他变量进行相同的分析。无论如何，我可以为这些变量设置标志吗？

df_test <- data.frame(id = c(0,1,1,1,2,3,4,5,5)
                          , var_1 = c("h","a","b","b","c","d","e","f","m"),
                          var_2=c("companyf","companyA","companyB","companyc","companyD","companyf","companyg","companyh","companyi"),
                          var_3=c(100,10,10,11,20,30,40,50,5))

    df_test_2= data.frame(id = c(1,1,1,2,3,4,5,5,6,6)
                             , var_1 = c("a","b","b","c","d","e","f","g","h","i"),
                             var_2=c("companyA","companyBB","companyc","companyD","companyf","companyg","companyh","companyi","companyii","companyff"),
                             var_3=c(10,10,11,200,30,40,50,5,40,20))

Answer 1

我们可以尝试使用setdiff和which修改您的方法>

要在df1中搜索var_1而不是在df2中搜索

df1[which(df1$var_1 == setdiff(df1$var_1,df2$var_1)),]

var_1的输出

  id var_1    var_2 var_3
9  5     m companyi     5

要在df1中搜索var_2而不是在df2中搜索

df1[which(df1$var_2 == setdiff(df1$var_2,df2$var_2)),]

var_2的输出

id var_1    var_2 var_3
3  1     b companyB    10