[R] statistical prediction for glm()
Thomas W Blackwell
tblackw at umich.edu
Mon Nov 24 17:11:31 CET 2003
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:
> 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
> R-help at stat.math.ethz.ch mailing list
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