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st: RE: RE: RE: Re: Foreach nested in Foreach


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: RE: Re: Foreach nested in Foreach
Date   Thu, 19 Oct 2006 13:29:49 +0100

Yes, good improvement. 

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

Scott Merryman
 
> Another slight simplification would be move the -levelsof- outside the
> loops.
> 
> su group, meanonly
> local max = r(max)
> levelsof bvd_id_number, local(levels)
> forvalues i=1/`max' {
> ....
 
Nick Cox

> > A further simplification to your code is
> > 
> > su group, meanonly
> > forvalues i=1/`r(max)' {
> > 	levelsof bvd_id_number, local(levels)
> > 	foreach l of local levels {
> > 		forval k = 1/`year_count' {
> > 			replace gamo = gamo + (tax[_`l']-
> > tax[_`k'])*ratio_assets[_`k'] ///
> > 			if bvd_id_number==`l'
> > 		}
> > 	}
> > }

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