Re: st: weights with Gaussian Kernel in lpoly, Stata 11

[Nicolas Debarsy <ndebarsy@fundp.ac.be>]

Hello Nick,
Thanks a lot for your quick answer.
Can you get results with the Gaussian Kernel ?
Best,
 Nicolas
Le 29/08/2012 14:48, Nick Cox a écrit :
> I can reproduce this with Stata 12. I suggest contacting Stata tech support.
>
> Nick
>
> On Wed, Aug 29, 2012 at 10:18 AM, Nicolas Debarsy <ndebarsy@fundp.ac.be> wrote:
> > Dear Statalist users,
> >
> > In a nonparametric regression using the lpoly command, I would like to put
> > different weights on observations.
> > However, when I want to use the Gaussian Kernel, I get the following error:
> >
> >               cross():  3200  conformability error
> >    _lpoly_work():     -  function returned error
> >              <istmt>:     -  function returned error
> >
> > For all the other kernels, the option [aw] runs.
> > Could you tell me if there is something special with the Gaussian kernel or
> > if it is a bug in the lpoly ?
> > I'm using Stata 11.
> >
> > Here is the code I used:
> >
> > set obs 300
> > drawnorm x3 e
> > gen x32=x3^2
> > gen y=x3+2*x32+e
> > gen d=uniform()
> > lpoly y x3 [aw=d], kernel(gaussian)
> > lpoly y x3 [aw=d], kernel(epan2)
> >
> > Already many thanks for your answer.
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