Re: [R] variance using lmer

From: Spencer Graves <spencer.graves_at_pdf.com>
Date: Fri 05 May 2006 - 12:14:26 EST

          I'm convinced that I do NOT understand your question, but the most probable answer given my prior is "no". To get a more specific answer, please provide more detail about the problem you are trying to solve, preferably including a simple, self-contained example, e.g., the examples in the "lmer" and "lmer-class" help pages. If the CarCorr and vcov functions do not answer your questions, please explain why not, e.g. using for illustration a 'predict' example applied to lme {nlme} or glm.

          I realize this does not answer your question, but I hope it gets you closer.

	  Buena Suerte,
	  spencer graves

Per Theilgaard wrote:
> Dear R help
> I have a question on the variance of the binomial probit model.
>
> I have fitted the following model :
>

>> lmer1<-lmer(mp ~ l + op + l*op+ us_lev + bw_lev +(1|tatu) ,  

> + family = binomial(link="probit"),
> + method = 'Laplace',
> + data = matings,
> + msVerbose= True)
>> summary(lmer1)

> Generalized linear mixed model fit using Laplace
> Formula: mp ~ l + op + l * op + us_lev + bw_lev + (1 | tatu)
> Data: matings
> Family: binomial(probit link)
> AIC BIC logLik deviance
> 1455.121 1556.387 -706.5605 1413.121
> Random effects:
> Groups Name Variance Std.Dev.
> tatu (Intercept) 0.42905 0.65502
> # of obs: 918, groups: tatu, 130
>
> Estimated scale (compare to 1) 0.8521378
>
> I suppose that the dispersion parameter has been restricted to be 1.
> Then the variance would be 1 + the variance of the random effect: 1+ 0.42905 ???
>
> Thany you very much in advance
> Per
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html


R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 05 12:19:13 2006

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Fri 05 May 2006 - 14:09:58 EST.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.