[ADMB Users] glmmADMB; offset

[H. Skaug]

Hi,

Sorry, but "offset" is not supported yet. It is unfortunate that it
appears in the argument list.

Hans

On Tue, Nov 9, 2010 at 4:29 PM, Myles Falconer <mfalconer at bsc-eoc.org> wrote:
> Hi ADMB users,
>
>
>
> I’m new to glmmADMB and R and just have a basic question...
>
>
>
> I have owl count data (y) from about 160 routes across Ontario, Canada. I am
> simply interested in looking at annual indices of owls. My data is
> overdispersed and zero-inflated, so I would like to fit it to a neg.binomial
> distribution and also use route as a random effect in the model. I have
> included an offset in the model since owl counts need to be adjusted
> according to effort (# of stations sampled)
>
>
>
> This is what I have:
>
> fit=glmm.admb(y~yr,random=~1,group="route",data=nswoc,family="nbinom",
> offset(log(stn)))
>
>
>
> My problem is that I don’t think the offset for the model is working
> properly. I get the exact same output with or without the offset included in
> the model. Am I doing this right? Anyone else have this problem before?
>
>
>
>
>
> Thanks
>
> ---------------------------------------------------------------------------------------------------------
>
> Myles Falconer
>
> Ontario Region Project Biologist,
>
> Bird Studies Canada,
>
> 115 Front St., P.O. Box 160,
>
> Port Rowan, ON
>
> N0E 1M0 Canada
>
> Email: mfalconer at birdscanada.org
>
> Ph: 1-888-448-2473 ext. 165
>
> BSC website: http://www.bsc-eoc.org/
>
>
>
>
>
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>