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From | Nick Cox <n.j.cox@durham.ac.uk> |
To | "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> |
Subject | RE: st: generating age using dates |
Date | Fri, 17 Dec 2010 17:19:42 +0000 |
How did you "encode" that? Nick n.j.cox@durham.ac.uk martine etienne the variable q1_dob2 is the only one that I generated from encoding the original variable q1_dob which was is in string format: des q1_dob storage display value variable name type format label variable label ---------------------------------------------------------------------------------------------------------------------- q1_dob str10 %10s all years are four digits, see below: tab q1_dob q1_dob | Freq. Percent Cum. ------------+----------------------------------- 01/04/1956 | 1 0.35 0.35 01/05/1964 | 1 0.35 0.70 01/05/1968 | 1 0.35 1.05 01/06/1956 | 1 0.35 1.39 01/06/1963 | 1 0.35 1.74 01/07/1960 | 1 0.35 2.09 01/10/1975 | 1 0.35 2.44 01/12/1957 | 1 0.35 2.79 also, there is only one missing date of birth in the original variable and it is coded as 99/99/9999, there are no missing dates in the survey_date variable. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/