[R-sig-ME] Lmer and variance-covariance matrix

[Rolf Turner]

On 12/03/11 02:56, Jarrod Hadfield wrote:
> Hi,
>
> In addition, each trait is only measured once for each id (correct?)
> which means that the likelihood could not be optimised even if the
> data-set was massive. If you could fix the residual variance to some
> value (preferably zero) then the problem has a unique solution given
> enough data, but I'm not sure this can be done in lmer?.

<SNIP>

I think that it ***CANNOT*** be done.  I once asked Doug about
the possibility of this, and he ignored me.  As people so often
do. :-) Especially when I ask silly questions .....

     cheers,

         Rolf Turner