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robertrao
Quartz | Level 8

Hi,

Thanks for the quick and detailed response.

Regards

Karun

Ksharp
Super User

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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