R help - Oct 2016 - Error in aictab with CLM model "function not yet defined"

Hi Caitie,
whatever it is you want to achieve, you seem to be doing it in a very
complicated way. The code you
gave appears to be for producing a model selection table, yet you say you're
trying to do model
averaging.

If you want a model selection table, why not use the one `dredge` produces (with
evaluate=TRUE, you
can add R^2 via argument 'extra')?
If you actually mean model averaging, there is `model.avg` that can be used
directly on `dredge`'s
output.

cheers,
k



W dniu 2016-10-04 o 12:00, r-help-request at r-project.org
pisze:
> Message: 10
> Date: Mon, 3 Oct 2016 05:47:11 +0000
> From: Caitie Kuempel <c.kuempel at uq.edu.au>
> To: "r-help at r-project.org" <r-help at r-project.org>
> Subject: [R] Error in aictab with CLM model "function not yet
defined"
> Message-ID: <cb84ce6b22614415a40df8aa56f99a25 at
uq-exmbx6.soe.uq.edu.au>
> Content-Type: text/plain; charset="UTF-8"
>
> Hi R help,
>
> I am trying to do some AIC model averaging on a CLM model in R and keep
getting the error:
>
> Error in aictab.default(cand.set = Cand.model0, modnames = Modnames0,  :
> Function not yet defined for this object class
>
>
> The MuMIn package says that the functions should work for clm and clmm
models so I'm not sure if I'm missing something or if there is an extra
step?  Any help or examples would be appreciated.
>
> My model (m1) works fine- which I fit using the clm() function from the
package ordinal.  Then I run the following:
>
> dred<-dredge(m1,rank="AICc",trace=TRUE,evaluate=FALSE)
> Cand.model0<-list()
> r2val<-rep(0,length(dred)) # r-square values
> for(i in 1:length(dred))
> {
>   print(length(dred)-i)
>  
Cand.model0[[i]]<-clm(as.character(dred[[i]])[2],data=datt2,REML=FALSE)
>   #r2val[i]<-summary(Cand.model0[[i]])$r.squared
> }
>
> Modnames0 <- paste("mod", 1:length(Cand.model0), sep = "
")
> t0<-aictab(cand.set=Cand.model0, modnames=Modnames0, sort = TRUE,
second.ord = TRUE,nobs = NULL)
> Error in aictab.default(cand.set = Cand.model0, modnames = Modnames0,  :
> Function not yet defined for this object class
>
> Thanks for your time.
>
> Best,
>
> Caitie
>
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>
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