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Re: st: empty dataset; display gives impossible answer
Sorry, perhaps this is my mistake.
CL_NR was the eleventh variable. and Stata should be reporting
At 17:09 04/06/30 +0900, I wrote:
> In case "CLPL =. "
> .list (varlist you need for the diagnosis)
> the "keep" I had an empty dataset, with only the names of all (about 50)
> variables. Why than did "display <variable1> <variable2>" give an
> answer, and what does it mean?
> . dis _N
> . keep if (FIRSTCAS==1 & CLPL~=1)
> (8200 observations deleted)
> . dis CL_NR UNIEKNR
> thanks for any thougts,
> A.M. Vos
> dept. of Public Health
> Erasmus MC
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