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Re: st: FW: argmax for -summaraize-


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: FW: argmax for -summaraize-
Date   Mon, 24 Jul 2006 22:23:22 +0100 (BST)

obviously you should take care of missing values,
so replace 
gen cond = rep78==3 

with
gen cond = rep78==3 & price <.

also see:
viewsource _gmax.ado
for similar code that you should be able to adjust
for your purpose.

HTH,
Maarten

--- Maarten buis <maartenbuis@yahoo.co.uk> wrote:

> something like:
> 
> sysuse auto, clear
> tab rep78
> gen cond = rep78==3
> bys cond (price): gen max = _n==_N & cond==1
> sum price if cond
> sum price if max==1
> 
> HTH,
> Maarten
> 
> --- "Feiveson, Alan H. (JSC-SK311)" <alan.h.feiveson@nasa.gov> wrote:
> 
> > Hello - Does anyone know an efficient way to identify the
> observation
> > at
> > which a particular variable is minimum or maximum (subject to `if'
> > and/or `in') ? 
> > 
> > Apparently -summarize- does not return this value. I see nothing in
> > -egen- nor  does "findit argmax" produce anything. I can program
> this
> > myself by looping through the observations but that is not
> efficient.
> > In
> > particular one cannot gurantee that anything like 
> > 
> > summ x
> > local xmax=r(max)
> > if x = `xmax' {
> 


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

visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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


	
	
		
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