[R] weights in mixed model

[Thomas Lumley]

On Tue, 2 Sep 2003, tzhou1 wrote:

> Hi,
>
> I have a question about how to do case weight in mixed model using R. I read
> Pinhiero and Bates (2000) Mixed-Effects Models in S and S-Plus. The weight
> functions in there are not what I wanted. Can R do case weight, giving each
> observation my own weight? If so, could you give me some references and
> examples? I'm looking forward to hearing from you!
>

It depends on what you mean by weights.

The standard thing to mean in regression is weights that are inversely
proportional to variances, but lme() does this, so I assume you mean
something else.  What?


	-thomas

Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle