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RE: st: a loop error of -foreach-


From   Grace Jessie <gracejessie@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: a loop error of -foreach-
Date   Sat, 18 Sep 2010 08:47:19 +0000

Sarah,
thank you very much!
It works well!
 
Grace

> From: sedging@ucla.edu
> To: statalist@hsphsun2.harvard.edu
> Subject: RE: st: a loop error of -foreach-
> Date: Fri, 17 Sep 2010 10:02:25 -0700
> 
> .
> Go with the previous suggestion of :
> 
> if "`j'" == "b" { 
> 
> I think that will work even if b is the name of a variable because you're
> telling stata to check whether the local macro j is equal to the string "b"
> rather than equal to the value of the variable b.
> 
> -Sarah
> 
> 
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Grace Jessie
> Sent: Friday, September 17, 2010 8:37 AM
> To: statalist@hsphsun2.harvard.edu
> Subject: RE: st: a loop error of -foreach-
> 
> More exactly, I want to do -reg b x1 x2- if `j' gets the value of b,and do
> -logit a/c/d x1 x2- otherwise, where x1 and x2 are independent variables.
> I just want to take the lists as elements and then do different things,i.e.,
> do different things for different elements in the lists.
> 
> Grace
> 
> 
> ----------------------------------------
> > From: gracejessie@hotmail.com
> > To: statalist@hsphsun2.harvard.edu
> > Subject: RE: st: a loop error of -foreach-
> > Date: Fri, 17 Sep 2010 15:26:06 +0000
> >
> > Dear Uli and Maarten,
> > Thank you for your replies.
> > I know what is wrong after your explanations.
> > However, what I want to do is letting stata interpret the elements of the
> lists just as elements, not variable names.
> > In fact, I want to do -count- commmand or any other commands if the
> element is b and do others (such as -su-) otherwise.
> > How to modify my loop for doing that?
> > Thank you.
> >
> > Best regards,
> > Grace
> >
> > ----------------------------------------
> > > Date: Fri, 17 Sep 2010 09:18:39 +0000
> > > From: maartenbuis@yahoo.co.uk
> > > Subject: Re: st: a loop error of -foreach-
> > > To: statalist@hsphsun2.harvard.edu
> > >
> > > --- On Fri, 17/9/10, Grace Jessie wrote:
> > > > I encountered a loop problem.
> > > > The commands I edited are as follwows.
> > > >
> > > > foreach j in a b c d {
> > > > foreach i in e f g {
> > > > if `j'==b {
> > > > count
> > > > }
> > > > else {
> > > > su
> > > > }
> > > > }
> > > > }
> > > >
> > > > Sometimes the error was showed "b ambiguous 
> > > > abbreviation",sometimes the error was "type mismatch".
> > > > What is wrong?
> > > > In my mind, -foreach lname in- can be followed by any_list.
> > >
> > > the problem is not with -foreach- but with the commands inside your 
> > > loop. Apperently the elements your are looping over are not always 
> > > unique variable names and sometimes they are string variable where 
> > > numeric variables where expected or vice versa.
> > >
> > > Hope this helps,
> > > Maarten
> > >
> > > --------------------------
> > > Maarten L. Buis
> > > Institut fuer Soziologie
> > > Universitaet Tuebingen
> > > Wilhelmstrasse 36
> > > 72074 Tuebingen
> > > Germany
> > >
> > > http://www.maartenbuis.nl
> > > --------------------------
> > >
> > >
> > >
> > >
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