Hi everyone, first time here
I have a longitudinal data set with 3500 unique individuals that looks like something below but i want to have a new variable where each unique individual will be represented in one row and not appear multiple times.
I used this code [generate subjectID: subjectid = subjectid] to create the new variable which is a replica of the old variable but don't seem to know how to exclude all the repeat subjectid that appear more than once.
How do i proceed?
subjectid
1
1
2
3
4
4
4
5
...
3500
Thanks
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