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

[Federico Calboli]

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 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 - see below), I would recommend that you do not quote results from a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