Hi, I have a dataset of individuals already sorted on a value. I would like to assign a pairID to the first two individuals, then the next pair, and so on. If the file contains an odd number of individuals, the last three are grouped to form a triplet. I hope that makes sense and would appreciate any tips. Thanks! HAVE WANT ID ID pairID 1 1 1 2 2 1 3 3 2 4 4 2 5 5 3 6 6 3 7 7 4 8 8 4 9 9 5 10 10 5 11 11 5
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