I have data of the form:
id obs1 obs2 obs3 obs4
1 20 0 66 53
2 0 0 0 0
3 0 5 8 0
4 4 5 6 55
5 5 36 2 6
6 58 3 58 6
How can I put it into the form:
1 20
1 0
1 66
1 53
2 0
2 0
2 0
2 0
3 0
3 5
3 8
3 0
4 4
4 5
4 6
4 55
5 5
5 36
5 2
5 6
6 58
6 3
6 58
6 6
Thanks!
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