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st: foreach command with multiple varlists


From   Fatma Romeh <fromeh1@student.gsu.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: foreach command with multiple varlists
Date   Thu, 28 Mar 2013 20:26:13 +0000

Dear statalist,

I have a question regarding the "foreach" command.  I'm wondering whether I can use multiple valists with "foreach"? More specifically, I'm looking for something like that:

foreach x of varlist  x1-x4  &  y of varlist y1-y4   &   z of varlist z1-z4 {

     gen  w= `x' if `y'==2 & `z'==1
}

when I did that, I got this error message: "& invalid name". What I want to do is to use the "foreach" command to replace these commands:
gen  w= x1 if y1==2 & z1==1
gen  w= x2 if y2==2 & z2==1
gen  w= x3 if y3==2 & z3==1
gen  w= x4 if y4==2 & z4==1

Is there a way to do that?



Many thanks,


Fatma, 

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