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 <[email protected]> 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)" <[email protected]> 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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