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 > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
