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st: Date: Sun, 28 Oct 2007 16:42:05 +0100


From   "Carlo Lazzaro" <carlo.lazzaro@tin.it>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Date: Sun, 28 Oct 2007 16:42:05 +0100
Date   Sun, 28 Oct 2007 11:42:26 -0400 (EDT)

Dear Statalisters,

I have a dataset composed of 30 variables (from patient_1 to patient_30).
Each variable includes 20 observations (daily cost per patient during a
20-day follow-up).

I would like to create a new variable containing only the 20th day
observation for each patient. I would figure out something like what
follows:

Patient_id   20th_day_observation
1		 cost 20th day patient1         
.			.
.			.
.			.
.			.
30		cost 20th day patient30         


Any hint highly welcomed.

Thanks a lot for your kindness and for your time.

Kind Regards,

Carlo

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