R help - Jul 2005 - Variance components from lm?

I often use simple nested random-effect models for interlaboratory data.
The variance components are important things to know.

Is there an R function or package that gets variance components from lm
objects? Or can someone point me to a method of doing so?

Under normal circumstances, 'RSiteSearch("variance
components")'
would likely identify "lme" in package nlme and lmer in package lme4. 
I
recommend lme, as it comes with a fairly complete set of helper 
functions described in Pinheiro and Bates (2000) Mixed-Effect Models in 
S and S-Plus (Springer).  "lmer" is Doug Bates' next generation
product
currently under development and lacking some of the helper functions 
available with lme.

	  spencer graves
p.s.  I said, "Under normal circumstances", because when I tried 
RSiteSearch just now, it didn't work.  When I went to 
"www.r-project.org" -> Search -> "R site search", I
got "Computer
trouble, July 13, 2005".  When it works (which is 99.7% of the time), it 
is my favorite tool for finding things about R for which I don't already 
know where to look.

Steve Ellison wrote:
> I often use simple nested random-effect models for interlaboratory data.
> The variance components are important things to know.
> 
> Is there an R function or package that gets variance components from lm
> objects? Or can someone point me to a method of doing so?
> 
> ______________________________________________
> R-help at 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
-- 
Spencer Graves, PhD
Senior Development Engineer
PDF Solutions, Inc.
333 West San Carlos Street Suite 700
San Jose, CA 95110, USA

spencer.graves at pdf.com
www.pdf.com <http://www.pdf.com>
Tel:  408-938-4420
Fax: 408-280-7915

> From: Spencer Graves
> 
> 	  Under normal circumstances, 'RSiteSearch("variance 
> components")' 
> would likely identify "lme" in package nlme and lmer in 
> package lme4.  I 
> recommend lme, as it comes with a fairly complete set of helper 
> functions described in Pinheiro and Bates (2000) Mixed-Effect 
> Models in 
> S and S-Plus (Springer).  "lmer" is Doug Bates' next 
> generation product 
> currently under development and lacking some of the helper functions 
> available with lme.
> 
> 	  spencer graves
> p.s.  I said, "Under normal circumstances", because when I tried 
> RSiteSearch just now, it didn't work.  When I went to 
> "www.r-project.org" -> Search -> "R site search",
I got "Computer
> trouble, July 13, 2005".  When it works (which is 99.7% of 
> the time), it 
> is my favorite tool for finding things about R for which I 
> don't already 
> know where to look.
The server (graciously created and maintained by Prof. Jonathan Baron)
crashed and a hard drive failure.  I was told it would likely be
back online next Monday.

I missed this search engine, too, as I've grown to depend on it quite
a bit.

Cheers,
Andy
 
> Steve Ellison wrote:
> 
> > I often use simple nested random-effect models for 
> interlaboratory data.
> > The variance components are important things to know.
> > 
> > Is there an R function or package that gets variance 
> components from lm
> > objects? Or can someone point me to a method of doing so?
> > 
> > ______________________________________________
> > R-help at 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
> 
> -- 
> Spencer 
> Graves, PhD
> Senior Development Engineer
> PDF Solutions, Inc.
> 333 West San Carlos Street Suite 700
> San Jose, CA 95110, USA
> 
> spencer.graves at pdf.com
> www.pdf.com <http://www.pdf.com>
> Tel:  408-938-4420
> Fax: 408-280-7915
> 
> ______________________________________________
> R-help at 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
> 
> 
>