[R-sig-ME] lme4 missing from repositories?

Douglas Bates bates at stat.wisc.edu
Wed Oct 20 17:29:12 CEST 2010


On Wed, Oct 20, 2010 at 10:18 AM, huang min <minhuangr at gmail.com> wrote:
> Hi, Prof. Bates,
>
> I tried some simple codes from Prof. Ripley.
>
> library(lme4)
> y <- (1:20)*pi; x <- (1:20)^2;group <- gl(2,10)
> M2. <- lmer (y ~ 1 + x + (1 + x | group))
> M2 <- lmer (y ~ x + ( x | group))
> identical(fixef(M2), fixef(M2.))

This is exactly what is so frustrating.  By the time the model
matrices have been constructed M2. and M2 are exactly the same model
so how they end up with different answers is somewhat mysterious and
something that we can't reproduce on other systems.

>
> The results are still false sometimes under MAC R2.12.0.
>
> Huang
>
> On Wed, Oct 20, 2010 at 11:05 PM, Douglas Bates <bates at stat.wisc.edu> wrote:
>>
>> I think that is thanks to Martin Maechler and Simon Urbanek.  Martin
>> contacted Simon off-list to work out some of the problems with that
>> particular test.  I'm not sure of the details but it seems at least
>> part of the problem was related to the use of veclib (accelerated BLAS
>> on the Mac OS X platform), which is a little scary.
>>
>> On Wed, Oct 20, 2010 at 9:00 AM, Federico Calboli
>> <f.calboli at imperial.ac.uk> wrote:
>> > On 20 Oct 2010, at 14:52, Federico Calboli wrote:
>> >>
>> >> I also upgraded to 2.12.0 and the binary and the source are both listed
>> >> as 0.999375-35 which seems to be the latest lme4 (*not* a or b) even on
>> >> r-forge.
>> >
>> > [Obviously] I had no problems.
>> >
>> > F
>> >
>> >
>> >
>> > --
>> > 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
>> >
>> > _______________________________________________
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>> > https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
>> >
>>
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>
>




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