I have data that looks like this: ID VAR A
1 2
1 2
1 2
1 4
1 4
1 3
1 3
1 3
1 4
1 4
1 3 I want it to look like this: ID VAR A_NEW
1 2 4 3 4 3 I would like to keep the first. observation of VAR A but without removing any duplicates if the first observation of VAR A is repeated. Thank you!
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