Re: st: RE: AW: Problem with grqreg

[Michael McCulloch <mm@pinestreetfoundation.org>]

Jeff,
In the example provided to you by Martin Weiss, the -local- command is  
not on the -sqreg- line of the example, but on the next line. Try  
putting a carriage return just before -local- so your example matches  
his.
Michael

*************
sysuse auto, clear
sqreg price mpg rep78 headroom trunk, quantiles(50 75 90) reps(20)
local rhs : colnames(e(b))
di in r "`rhs'"
*************





On Feb 24, 2010, at 8:57 AM, Jeff wrote:

> This is a cool command.  Though a novice with Stata, I use Stata 10,  
> one
> of the reasons I purchased it was for the qreg function.  However, I  
> was
> not able to reproduce the command below:
>
> sqreg price mpg rep78 headroom trunk, quantiles(50 75 90) reps(20)  
> local
> rhs : colfullnames(e(b))
>
> When I use the above syntax, I get the error:  option local not  
> allowed
> I however was able to reproduce:
> sqreg price mpg rep78 headroom trunk, quantiles(50 75 90) reps(20)
>
> Can some help or explain.
>
> Thank you in advance
>
> Jeffrey B. Wolpin
> Certified Business & Real Estate Appraiser
>
> Accredited Business Appraisals & Brokerage
>
>
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Martin  
> Weiss
> Sent: Tuesday, February 23, 2010 5:11 AM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: AW: Problem with grqreg
>
>
> <>
>
> The underlying problem is that _sqregtrace.ado, an auxiliary ado to - 
> ssc
> d
> grqreg-, strips of the column names from the "e(b)" matrix returned by
> -sqreg-. The trouble is that for every quantile requested in the -q()-
> option to -sqreg-, the names will be repeated, as seen in this example
> featuring 3 quantiles:
>
>
> *************
> sysuse auto, clear
> sqreg price mpg rep78 headroom trunk, quantiles(50 75 90) reps(20)
> local rhs : colnames(e(b))
> di in r "`rhs'"
> *************
>
> This macro "rhs" is then fed to a call to -postfile- which, rightly,
> complains of duplicate entries.
>
> So the solution would be to prepend the "rhs" variables with the
> quantile in
> question, which could be achieved by modifying the above call to -  
> local
> rhs
> : colfullnames(e(b))-.
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Michael  
> C.
> Morrison
> Gesendet: Dienstag, 23. Februar 2010 04:34
> An: statalist@hsphsun2.harvard.edu
> Betreff: st: Problem with grqreg
>
> I'm having a problem with grqreg.
>
> After running a quantile regression with:
>
>     sqreg  pincp  ageqtr retp schl_group semp sex wagp, q(.05 .10 .25
> .50 .75 .90 .95)
>
> I want to graph the coefficients of the quantile regression with  
> grqreg
> with the following command:
>
>     grqreg, ci ols
>
> However, I receive the following error:
>
>     postfile: variable ageqtr already exists
>     r(110);
>
> (Note that "ageqtr" is the first independent var in the quantile
> regression.)
>
> All my variables have labels.
>
> Any help would be greatly appreciated. I'm using Stata version 11, 64
> bit, Windows 7.
>
> Mike
>
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Best wishes,

Michael McCulloch
Pine Street Foundation
124 Pine Street
San Anselmo, CA 94960-2674
tel:	415-407-1357
fax: 	206-338-2391


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