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Re: st: Re: Loop syntax


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Loop syntax
Date   Thu, 27 Mar 2008 13:20:37 +0000 (GMT)

--- Johannes Geyer <JGeyer@diw.de> wrote:
> @Nick: What is the difference between -total()- and -sum()- that
> makes the latter better than the other?

You can find that out by yourself if you knew that functions in egen
are stored in _g<functionname>.ado . So, if you type:

viewsource _gtotal.ado

and 

viewsource _gsum.ado

You can see that -sum()- calls -total()-, leading to unnecesary
overhead, otherwise the two are the same. 

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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