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| From | lydia huang <lydiahsh@yahoo.com.cn> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: do file |
| Date | Mon, 8 Mar 2010 18:24:39 +0800 (CST) |
Dear Statalist,
is there any thing wrong with the following do-file:
/* sort and save the using data*/
cd H:\my\2007
use written, clear
sort patient_id
save, replace
/* sort the master data*/
use 13, clear
sort patient_id
/* merge based on "patient_id" and save*/
merge patient_id using written
save final07, replace
i don't know why, but all the observations in the final07 have doubled.Why has this happened? what can i do?
Best wishes
Lydia
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