Message-ID: <51ADF87F.5060304@mpipz.mpg.de>
Date: 2013-06-04T14:23:59Z
From: Jonas Klasen
Subject: Mixed effects model with a distance matrix as a random effect
In-Reply-To: <51ADE195.9060006@mpi-marburg.mpg.de>
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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>
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--
__________________________________________________
Jonas Klasen
PhD student
Genome Plasticity and Computational Genetics
Max Planck Institute for Plant Breeding Research