I have variables group and order. I want a new variable which is counting 1s in the variable order in each group.
could you please help me to create the new variable ("wanted-counting 1s in each group")?
| group | order | wanted-counting 1s in each group |
| a | 1 | 1 |
| a | 2 | |
| a | 3 | |
| a | 1 | 2 |
| a | 2 | |
| a | 3 | |
| a | 1 | 3 |
| a | 2 | |
| a | 1 | 4 |
| a | 2 | |
| a | 3 | |
| a | 4 | |
| b | 1 | 1 |
| b | 1 | 2 |
| b | 2 | |
| b | 3 | |
| b | 1 | 3 |
| b | 2 |
Masoumeh
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