[R] Using the mcmcsamp function

Hank Stevens HStevens at MUOhio.edu
Sat Sep 27 15:18:37 CEST 2008

mcmcsamp does not yet operate on non-normal distributions.
On Sep 27, 2008, at 9:06 AM, Parry Clarke wrote:

> Hello,
> I'm building a couple of mixed models using the lmer function.
> The actual modelling is going well, but doing some reading on the  
> use of
> crossed random effects and the comparison of models with and without
> random effects it is clear that I need to generate some Markov Chain  
> Monte
> Carlo samples. However, I'm struggling because everyone time I go to
> generate a sample I get the following error:
> 'Error in .local(object, n, verbose, ...) : Update not yet written'
> Can anyone tell me what this means and how I can resolve it, I'm  
> using R.
> 2.7.2 and updated 'lme4' yesterday
> The code I use is as follows:
> model<-lmer(FemApp~MaleWith+(1|MaleID)+(1| 
> FemID),poisson,data=Compliance)
> mcmp<-mcmcsamp(model3, n= 1000)
> Thanks in advance
> Parry
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Dr. Hank Stevens, Associate Professor
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Miami University
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