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st: RE: -foreach-, local macro, -split- command


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: -foreach-, local macro, -split- command
Date   Tue, 8 Sep 2009 23:38:49 +0200

<>

There are several ways to make the -foreach- work, but I do not think that
yours is appropriate. See how the last one in this example fails...


**************
sysuse auto, clear
levels rep, loc(myreps)

foreach level of local myreps{
	di `level'
}

foreach level in `myreps'{
	di `level'
}

foreach level of myreps{
	di `level'
}
**************


HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of David Torres
Sent: Dienstag, 8. September 2009 23:32
To: statalist@hsphsun2.harvard.edu
Subject: st: -foreach-, local macro, -split- command

Okay, I would say I'm about to pull out my hair, but since I don't  
have any I will spare you the cliche.

I have a minor problem working with a local macro created within a  
loop command (-forv-), which is followed by another loop command  
(-foreach-).  This is the deal:


1.  I lead with a -levelsof- command, then store the values in a local
macro.
2.  I call the local macro in a -foreach- command, replacing a  
previously generated variable with the values therein.
3.  My values are actually strings and take up a bit of space within  
the one variable created for them (Stata only allows up to 244  
characters for string variables).  This means that some of the values  
don't get recorded.
4.  The -split- command works wonderfully at creating a different  
variables for the multiple responses recorded into the single variable  
filled from my local macro.

My question is this:  Is there some way I can call the values in my  
local macro and record them into different variables without having to  
fill the limited space Stata allows in a variable?

I guess this would be a one-to-many split, but without a variable to  
actually split.  The information for splitting would be stored in  
another form or something.

If I have 5000 students who have each scored differently on IQ scales  
at several times over several years and their position in the  
distribution are stored as strings (mentally retarded, borderline, low  
normal, etc.), some of the observations will, when called in the  
-foreach- command, exceed the 244 character limit.

This is sort of what I'm doing:

levelsof wais, local(lev)
foreach l of lev {
   replace generatedvar="`l' "...
  }

split generatedvar

Everything else works fine; I'm just missing those values (strings and  
portions thereof) in excess of 244 characters.

Thanks,


--------------------------------------------

David Diego Torres

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