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st: Re: loop that refers to global


From   "Scott Merryman" <smerryman@kc.rr.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: loop that refers to global
Date   Tue, 24 Jun 2003 17:49:42 -0500

----- Original Message ----- 
From: "Savych, Bogdan" <savych@rand.org>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, June 24, 2003 5:03 PM
Subject: st: loop that refers to global


> I want to write a do-file that uses loops to refer to some global macros.
> Global macros define different variables that I want to use in different
> regressions.  However, when I run program I receive an error.  Example of
> the do-file is goes like this:
>
> version 7
> global cov1="var3"
> global cov2="var3 var4"
> global cov3="var3 var4 var5"
>
> local i=1
> while `i'<=3 {
> logistic y var1 var2 $cov`i'
> local i=`i'+1
> }
>
>
> After I run this do file it gives an error:
>
> 1 invalid name
> r(198);
>
> Does this mean that I can not use loops that refer to macros?  What should
I
> change for this to run?  Any advise would be appreciated.  Option to write
> explicitly each regression does sound quite attractive.
>
> Thanks,
>
> Bogdan Savych
> Graduate Fellow
> RAND Graduate School


How about with local macros?  This works:

local cov1   "price"
local  cov2   "price weight"

forval i = 1/2 {
logit fore  length   `cov`i''
}

Hope this helps,
Scott


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