[R-sig-ME] lme4a, glmer and all that

[Douglas Bates]

On Thu, Mar 4, 2010 at 9:34 AM, Federico Calboli
<f.calboli at imperial.ac.uk> wrote:
> Dear Doug,
>
>> This is a good news - bad news announcement.  As Ben Bolker indicated
>> in a recent thread, the lme4a version of the lme4 package is
>> undergoing rapid development and the capability of fitting generalized
>> linear mixed models with glmer has recently been added.
>
> I did not pay tons of attention to what was going so I take to opportunity to ask: is lme4a somethink akin a transition that will automagically replace lme4 once you're happy with it or will I have to install it side by side?

The former.  It is such a departure from the earlier formulation that
I needed to develop it in a separate area until I could get all the
pieces working.

>> The bad news is that I can't reproduce the results from a GLMM fit
>> using the currently released lme4 package and I am suspicious that the
>> results from the current version of lme4 are the inaccurate ones.
>> Although I'm still trying to verify this (and I would appreciate help
>> - see below), I would recommend that you do not quote results from a
>> GLMM fit with version 0.999375-32 of the lme4 package.
>>
>> Having others trust the results from this software and then find out
>> that these are wrong is about the worst thing that I can imagine
>> happening in my work.  If this is the case I sincerely apologize.
>
> Ok, no problem! In a way that kind of resolves my attempt of replacing clogit() with lmer, and I'm grateful for your warning. I could try build lme4a --should I do it, would it be of any help if I sent you the results? I do not have any other software to compare with, just other R packages.
>
> Best,
>
> Federico
>
>
>
>
>
> --
> Federico C. F. Calboli
> Department of Epidemiology and Biostatistics
> Imperial College, St. Mary's Campus
> Norfolk Place, London W2 1PG
>
> Tel +44 (0)20 75941602   Fax +44 (0)20 75943193
>
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
>
> _______________________________________________
> R-sig-mixed-models at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
>