Hi,
Thanks for the quick and detailed response.
Regards
Karun
Astounding is a good one .Have already given you a detail explanation .
I just want give an example to demonstrate it .
For each of data step iteration , I set ina=0 and inb=0. when this obs belong to A or B, ina or inb will be set 1 respectively .
A
id
1
1
2
2
2
B
id
1
1
1
2
2
A B ina inb
1 1 1 1
1 1 1 1
. 1 0 1
2 2 1 1
2 2 1 1
2 . 1 0
If you didn't set ina=0 and inb=0, then both of them will always be 1 until reaching the next BY group.
Ksharp
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