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| From | Nicholas Winters <nicholas.winters@mail.mcgill.ca> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: keeping variables and subjects with specific observations |
| Date | Fri, 18 Oct 2013 00:07:20 +0000 |
I have a data set with multiple entries per subject, I want to keep only the entries were two variables are equal (Year and int_year). So i want all entries for for all variables in my data set but only for when Year=int_year data looks like this: subject exposure Year int_year 1 3 1990 1991 1 4 1991 1991 1 3 1992 1991 1 4 1993 1991 2 3 1990 1990 2 5 1991 1990 3 3 1990 1990 3 4 1991 1992 3 3 1992 1992 Any ideas how? Nick * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/