[R-sig-ME] extracting variance components in lme4?

[Fabian Scheipl]

I'd suggest getVarComps() for its close analogy to nlme::getVarCov()...

> On 2/6/07, Fabian Scheipl <f.abian at gmx.net> wrote:
> > try
> >
> > vc      <-VarCorr( model1 )
> > varcomps<-c(unlist( lapply(vc, diag) ), # random intercept variances
> >             attr(vc,"sc")^2)            # residual variance
> >
> > also works if you have multiple random terms (intercept and slope, e.g.)
> for a given grouping factor.
> > Extracts the respective variances without the covariances.
> 
> Yes, indeed.  That is better than the version that I suggested.  Thanks.
> 
> If a good name for such an extractor can be suggested I will
> incorporate it in the lme4 package.  Any suggestions for a name?

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