[R] Updating lmer - object is not subsettable?

[Douglas Bates]

Can you show a traceback on this example?  It may be related to a
problem that I just fixed in the development version of the lme4
package.

Alternatively if you can make the data available I can generate a
traceback myself.


On 9/12/06, Jarrett Byrnes <jebyrnes at ucdavis.edu> wrote:
> I'm attempting to write a general function to implement Faraway's
> bootstrapping algorithm for mixed models with lmer, but have run into
> a curious problem.  I'm comparing two models
>
> model.1<-lmer(Response ~ Treatment + (1|Trial), data=exp.data,
> method="ML")
> model.2<-lmer(Response ~ 1 + (1|Trial), data=exp.data, method="ML")
>
>
> When I attempt to update model.2 with simulated data, however, I get
> the following error:
>
> sim.data<-unlist(simulate(model.1))
> sim.model.2<-update(model.2, sim.data~.)
>
> Error in x[[3]] : object is not subsettable
>
>
> Now, the following
> sim.model.1<-update(model.1, sim.data~.)
>
> appears to work just fine.  Does anyone know why update won't work,
> and is there something I can do about this?
>
> -Jarrett
>
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