Re: st: AW: RE: Number of a subset of variables in local

[Antoine Terracol <Antoine.Terracol@univ-paris1.fr>]

OK, in fact, with lists larger than 37 names, both the following work:

local mycount1: list sizeof myvars
local mycount2: word count myvars

but

local mycount3=wordcount("`myvars'") will byte

--------------------------------------
clear*

forv i=1/100{
	gen name`i'=.
}

unab myvars: name*
local mycount1: list sizeof myvars
local mycount2:word count(`"`myvars'"')
local mycount3=wordcount("`myvars'")
di `mycount1'
di "`mycount2'"
di "`mycount3'"
-----------------------------------------

Antoine

On 19/08/2010 15:54, Antoine Terracol wrote:
> Right, had forgotten about that (though I've been beaten more than once...)
>
> So I guess the correct 2-liner would be:
>
> unab myvars : name*
> local mycount: list sizeof myvars
>
> Antoine
>
>
>
> On 19/08/2010 15:45, Martin Weiss wrote:
> > <>
> >
> > Also, Sven, you want to be extra careful when applying both solutions
> > to a
> > large project, i.e. many members of the -varlist- "name*":
> >
> > *************
> > clear*
> >
> > forv i=1/100{
> > gen name`i'=.
> > }
> >
> > unab myvars1: name*
> > local mycount1=wordcount("`myvars1'")
> >
> > qui d name*, varlist
> > *local myvars2 `r(varlist)'
> > local myvars2 =r(varlist)
> > local mycount2: list sizeof myvars2
> > ma di
> >
> > di in r `mycount1' ", " `mycount2'
> > *************
> >
> >
> > If you comment in the line
> >
> > - local myvars2 `r(varlist)'-
> >
> > and -consequently- comment out the line below it, you will get the
> > correct
> > result "100" for -local- "mycount2". See NJC`s
> > http://www.stata-journal.com/article.html?article=pr0045 for
> > explanations...
> >
> >
> > HTH
> > Martin
> >
> >
> > -----Ursprüngliche Nachricht-----
> > Von: owner-statalist@hsphsun2.harvard.edu
> > [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Trelle Sven
> > Gesendet: Donnerstag, 19. August 2010 15:27
> > An: statalist@hsphsun2.harvard.edu
> > Betreff: st: RE: Number of a subset of variables in local
> >
> > Thanks to Martin and Antoine, that was quick.
> > Both solutions work fine (Antoine's is two lines though).
> > Thread closed. Sven
> >
> > Two line solution:
> > unab myvars : name*
> > local mycount=wordcount("`myvars'")
> >
> > Three line solution:
> > d name*, varlist
> > local myvars=r(varlist)
> > local mycount: list sizeof myvars
> >
> >
> >
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/help.cgi?search
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/help.cgi?search
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
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