[R-sig-ME] Estimated scale in R 2.8.1

Ben Bolker bolker at ufl.edu
Tue Feb 10 15:17:52 CET 2009

  You have to explicitly write


because in this version of lme4 "sigma" is hidden within
the package namespace.  (The triple colon is S4 magic
for extracting an otherwise hidden function from
a namespace.)


Nola M. Stephens wrote:
> Thanks for the suggestion. But when I try sigma(model), I get this error 
> message: could not find function "sigma". Any other thoughts?
> Thanks!
> nola
> Ben Bolker wrote:
>>   Your mileage may vary, but I have found
>> lme4:::sigma(model)
>> to be a reasonably reliable way to get it.
>>   Ben Bolker
>> Nola Stephens wrote:
>>> Hi,
>>> When using earlier version of R (2.6.2), I got a scale factor for an
>>> lmer model (where family=binomial). But after downloading R version
>>> 2.8.1, I'm unable to find this value.
>>> I'd really appreciate some advice on how to find this.
>>> Thanks!
>>> nola
>>> _______________________________________________
>>> R-sig-mixed-models at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models

Ben Bolker
Associate professor, Biology Dep't, Univ. of Florida
bolker at ufl.edu / www.zoology.ufl.edu/bolker
GPG key: www.zoology.ufl.edu/bolker/benbolker-publickey.asc

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