New variable equals cumulative totals by id

 

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*(Q) How can I calculate 1) cumulative totals and 2) cumulative totals by id.

*(A) By Ray 2002/04/13.
* http://pages.infinit.net/rlevesqu/index.htm

DATA LIST LIST /patid count.
BEGIN DATA
3002   12	
3002   11 
3002   12 
3003   3 
3003   4 
3003   3 
END DATA.

* To create a cumulative sum.
CREATE cumul=CSUM(count).

* To get a running total 'cumul' by group (patid).
SORT CASES BY patid.
SPLIT FILE BY patid.
CREATE cumul2=CSUM(count).
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