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RE: st: Keeping observations

From   "Svend Juul" <SJ@SOCI.AU.DK>
To   <>
Subject   RE: st: Keeping observations
Date   Thu, 9 Jun 2005 11:35:29 +0200


The following commands will do. The purpose of -obsno- is to make sure
that the sort order within subjects is preserved; you might have a date
variable to take care of that.

gen obsno=_n
sort id obsno
by id: gen emp2=2 if employ[1]==2
keep if emp2==2

Hope this helps


Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000  Aarhus C, Denmark
Phone: +45 8942 6090
Home:  +45 8693 7796

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