glmulti and liner mixed models

Question

I have a problem with the glmulti package and linear mixed models. When I try to estimate the model-averaged coefficients with the coff.glmulti function I get this error:

Answer 1

If you are using one of the latest versions of lme4, the getfit() function I recommended is no longer adapted. Indeed, the lme4 package maintainers have made quite a lot of changes in their package: the class of objects is now "merMod", where it was "mer", and a few other things.

Then the getfit function must be slightly adjusted in order to interface glmulti with the new lme4 structure. Here a a getfit definition that works with the latest builds of lme4 for Ubuntu 12.04, as of yesterday:

setMethod('getfit', 'merMod', function(object, ...) {
summ=summary(object)$coef
summ1=summ[,1:2]
if (length(dimnames(summ)[[1]])==1) {
    summ1=matrix(summ1, nr=1, dimnames=list(c((Intercept)"),c("Estimate","Std.    Error")))
}
cbind(summ1, df=rep(10000,length(fixef(object))))
})

This should fix the issue. [see also my website http://vcalcagnoresearch.wordpress.com/package-glmulti/] Regards