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st: RE: programming problem


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: programming problem
Date   Thu, 16 Aug 2007 18:53:30 +0100

Short of a solution using -reshape-, I think
this will suit: 

gen mycond = 0 
forval j = 1/12 { 
	replace mycond = 1 if `j' == month & var`j' == 1 
} 

where I assume that your -var*- are 1 when true. 

Nick 
n.j.cox@durham.ac.uk 

Jeph Herrin
 
> I have observations on patient admissions over
> a 12 month period.
> 
> For each observation, I have 12 variables, call
> them var1-var12, which indicate whether a certain
> condition was met for that patient for months 1-12.
> So, eg, it may be true for months 1-3 and 7-12.
> 
> I also have a variable -month-, which indicates
> the current month of the observed admission. What
> I want to capture is whether the condition was true
> in the month of admission.
> 
> For instance, at first I unthinkingly tried this:
> 
>   gen mycond = var`=month'==1
> 
> but this of course uses the first observed value
> of -month-, which happens to be 6, and only checks
> -var6-.
> 
> I eventually got there by creating lots of vars, but is
> there a more direct solution?
> 

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