Re: st: AW: Problem with grqreg

["Michael C. Morrison" <morrimic@niacc.edu>]

Thanks Martin for the excellent diagnosis and recommendation. Your 
contributions to this list are outstanding!

Mike


On 2/23/2010 7:10 AM, Martin Weiss wrote:
> <>
>
> 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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