[R-sig-ME] lme4, failure to converge with a range of optimisers, trust the fitted model anyway?

[Ken Beath]

OK then, the way you were doing it is OK.


On 5 April 2015 at 21:58, Hans Ekbrand <hans.ekbrand at gmail.com> wrote:

> On Sun, Apr 05, 2015 at 01:56:03PM +0200, Hans Ekbrand wrote:
> > > > > While I'm thinking of it, should clusters and country random
> effects have
> > > > > been crossed. Generally the sampling is setup so that clusters are
> nested
> > > > > within countries which requires a different syntax.
> > > >
> > > > I'm sorry but I haven't been clear on this, but the clusters are
> > > > nested within countries, so there are no crossed random effects to be
> > > > found.
> > > >
> > > >
> > > The  random effect then needs to be included as (1|country/clusterID)
> >
> > Well, no, cluster is implictly nested in country, just as sample is
> > implicitly nested in batch in the Pastes data (see p 39-40 in
> > http://lme4.r-forge.r-project.org/book/Ch2.pdf)
>
> Sorry if this was unclear, but the ClusterID variable was created in a
> similar way that Bates creates the sample variable on page 40 in that
> text. [ English is not my native language ]
>
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*Ken Beath*
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