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dupes
2008 Dec 15
5
how to create duplicated ID in multi-records per subject dataset
Hi R helpers,
If I have a dataset looks like:
ID record
1 20
. 30
. 25
2 26
. 15
3 21
4.....................
And I want it becomes
ID record
1 20
1 30
1 25
2 26
2 15
3 21
4.....................
That is, I have to duplicate IDs for those with multiple records. I am wondering it is possible to be