goodness of fit for poisson glm - was:Re: [R] statistical prediction for glm()

[Martin Wegmann]

I have to apologize, my subject was misleading or wrong. 

thanks for pointing me to the correct name/description. 

A goodness of fit measure for a Poisson GLM is what I am looking for.

I am looking for a method similar to cv.glm(),to receive the estimate of 
prediction error.

I will have a look at the references given below, thanks for them. 

Martin

On Monday 24 November 2003 17:11, Thomas W Blackwell wrote:
> Martin  -
>
> Do you want a goodness of fit measure for a Poisson glm ?
>
> I would start py plotting the residuals and doing an
> analysis of deviance on nested models.  See McCullagh and
> Nelder, as well as more recent references.
>
> -  tom blackwell  -  u michigan medical school  -  ann arbor  -
>
> On Fri, 21 Nov 2003, Martin Wegmann wrote:
> > Hello,
> >
> > possibly it is a stupid question but after few hours of trying and
> > searching, perhaps I used the wrong key words, I decided to post it.
> >
> > I have the output of a glm() of count data (poisson).
> > I would like to get the prediction error (cross-validation).
> >
> > cv.glm() does not work with poisson error family data. Or I have to
> > transform the output error pred. in some way.
> >
> > are there method especially for glm() with different error families to
> > receive the model goodness / the model badness?
> >
> > thanks in advance, Martin
> >
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