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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.
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