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Re: st: RE: accessing variables created within a foreach loop


From   "Vera E. Troeger" <V.E.Troeger@exeter.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: accessing variables created within a foreach loop
Date   Fri, 9 Jun 2006 14:58:38 +0100 (BST)

Alex, many thanks that helps a lot.
Vera
_______________________________________
Vera E. Troeger
Lecturer in Political Science
University of Exeter
Department of Politics
Amory Building
Rennes Drive
Exeter, Devon EX4 4QJ
UK
phone: +44.1392.264632

e-mail: v.e.troeger@exeter.ac.uk

Home:
39 Altamira
Topsham, Exeter EX3 0AQ
UK


> I'm not going to try to figure out the exact syntax with respect to
> single/double/compound quotes.  However, you will be able to do
> something similar to this:
>
> Before starting the loop, create a local macro:
>
> local MyVarlist ""
>
> Within the loop, you can add to it:
>
> local MyVarList = "`MyVarList'" + " " +  "`z'`i'"
>
> Again, the quoting/spacing you need might be slightly different -- but
> it looks like you needed to know how to append to a local macro varlist,
> which this shows.
>
> Hope this helps,
> Alex
>
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Vera E.
> Troeger
> Sent: Friday, June 09, 2006 8:08 AM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: accessing variables created within a foreach loop
>
> I have the following problem, for a larger program I try to use the unit
> means of some regressors (from a syntax varlist) in a later estimation.
> I manage to get the unit means for all specified variables in varlist
> (zvar in this case)
> the part of the program would look as follows:
>
>
>
> program define test
> local i = "_m"
> local zvar z1 z2 z4
>     foreach z of local zvar {
>         sort `ivar'
>         tempvar `z'`i'
>         by `ivar': egen ``z'`i''= mean(`z')
>     }
> end
> test
>
>
> what I do not manage is to "put" the newly generated ``z'`i'' variables
> (from the loop) into a local macro (a varlist that I can use later on)
> since I cannot refer to the `z'`i' once the loop is terminated. within
> the loop I have no clue how to append each new generated variable
> (`z'`i' ) to a local macro varlist. I know in this specific program the
> newly generated variables are stored as local macros with the names
> z1_m,
> z2_m and z4_m. but for this to be part of an estimator the variables in
> zvar are specified by the user and I then cannot directly refer to them.
> I hope I made myself sufficiently clear.Any advise would be
> highly appreciated.
> many thanks,
> Vera
>
> _______________________________________
> Vera E. Troeger
> Lecturer in Political Science
> University of Exeter
> Department of Politics
> Amory Building
> Rennes Drive
> Exeter, Devon EX4 4QJ
> UK
> phone: +44.1392.264632
>
> e-mail: v.e.troeger@exeter.ac.uk
>
> Home:
> 39 Altamira
> Topsham, Exeter EX3 0AQ
> UK
>
>
>
>
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