[R-sig-ME] Mixed effects model with a distance matrix as a random effect

[Jonas Klasen]

Hi Roey,
do you mean as Z-matrix or as var-covar relationship matrix? For the 
later see lmekin (coxme package). There you can specify a similarity 
matrix (K) for a random effect (u):
u ~ N(0, sigma_u^2 K)

or one of the following packages: regress, rrBLUP, EMMA 
(http://mouse.cs.ucla.edu/emma/)

Bests
Jonas

On Tue 04 Jun 2013 02:46:13 PM CEST, Roey Angel wrote:
> Hi,
> I'm trying to build a mixed-effects model in which I'd like to include
> either a distance matrix as a random effect.
> The troubles I've had are that function lmer() in package lme4 only accepts a data frame column as a random factor and not a distance matrix.
>
> Is there a way around it?
>
> Thanks in advance
> Roey
>
>
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--
__________________________________________________

 Jonas Klasen
 PhD student
 Genome Plasticity and Computational Genetics
 Max Planck Institute for Plant Breeding Research