Re: [R] Mixed-effects model for overdispersed count data?

2010-10-25 Thread Ben Bolker
dave fournier otter-rsch.com> writes: > > According to the documentation for glmmADMB if you fit > your model with a statment like > > fit =glmm.admb(y~Base*trt+Age+Visit, ... data=epil2,family="nbinom") > > and that the parameter estimates are in > > fit$b while their estimated standar

Re: [R] Mixed-effects model for overdispersed count data?

2010-10-25 Thread dave fournier
According to the documentation for glmmADMB if you fit your model with a statment like fit =glmm.admb(y~Base*trt+Age+Visit, ... data=epil2,family="nbinom") and that the parameter estimates are in fit$b while their estimated standard deviations are in fit$stdbeta so presumably p val

Re: [R] Mixed-effects model for overdispersed count data?

2010-10-25 Thread Ben Bolker
Marie-Hélène Hachey hotmail.com> writes: > > > Hi, > > I have to analyse the number of provisioning trips to nestlings > according to a number of biological and > environmental factors. I was thinking of building a mixed-effects model > with species and nestid as > random effects, using a Poi

[R] Mixed-effects model for overdispersed count data?

2010-10-25 Thread Marie-Hélène Hachey
Hi, I have to analyse the number of provisioning trips to nestlings according to a number of biological and environmental factors. I was thinking of building a mixed-effects model with species and nestid as random effects, using a Poisson distribution, but the data are overdispersed (variance/