[R] varFixed

[Thomas Lumley]

On Sat, 20 Dec 2003, Harold Doran wrote:

> Dear List:
>  Earlier this week I posted a question and received no response, and I
> continue to struggle with my model. My original question is pasted
> below.
>  I am using lme and want to fix the variance of the within group
> residual at 1 (e~n(0,1). I think the varFixed function should be used to
> accomplish this, but I am struggling to figure out how to do this.
>

I don't think this is possible.  I've tried to get this sort of effect
(for meta-analyses) and have not been able to. I think there is always an
overall scale factor for variances estimated.

	-thomas