假设我的数据框(mydata)中有三个变量:1)id,2)case和3)value.
mydata <- data.frame(id=c(1,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4), case=c("a","b","c","c","b","a","b","c","c","a","b","c","c","a","b","c","a"), value=c(1,34,56,23,34,546,34,67,23,65,23,65,23,87,34,321,87))
mydata
id case value
1 1 a 1
2 1 b 34
3 1 c 56
4 1 c 23
5 1 b 34
6 2 a 546
7 2 b 34
8 2 c 67
9 2 c 23
10 3 a 65
11 3 b 23
12 3 c 65
13 3 c 23
14 4 a 87
15 4 b 34
16 4 c 321
17 4 a 87
对于每个id,我们可以有类似的"case"字符,它们的值可以相同或不同.所以基本上,如果它们的值相同,我只需要保留一个并删除副本.
那么我的最终数据将是 …