  Just to explain what's going on here a little bit more (and Cc:ing to
r-sig-mixed-models for posterity):  'mymodel' is an object of class
"lmerMod" or "glmerMod", which are special cases (I would say
"superclasses", but I'm not sure that's the correct technical term) of the
"merMod" class.  The key is that "merMod" is an _S4_ class, which means
that its information is stored in _slots_ within the object (see ?slot,
?slotNames, ?"@"). The "optinfo" slot is just a regular list of lists, so
its subcomponents are accessed via "$" or "[[".

  Ideally you should not have to mess with this level of knowledge about
the internal structure of the object, but at the moment we haven't provided
any better way to do it than reaching into the guts of the object this way.

See https://github.com/lme4/lme4/issues/217

On Mon, Jul 7, 2014 at 6:07 AM, Juan Andres Hernandez <
jhernandezcabrera@gmail.com> wrote:

> Thank you Ben @ is the point. I tryed with mymodel$optinfo$conv$lme4,
> mymodel['optinfo$conv$lme4'] and so on and nothing works.
>
> mymodel@optinfo$conv$lme4
>
> Best
> Juan
>

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