[R-sig-ME] use of pedigree structures

[Douglas Bates]

The pedigree class has been moved to the pedigreemm package, which is
also on R-forge

http://r-forge.r-project.org/projects/pedigreemm

In that package Ana Vazquez and I are developing methods to
incorporate pedigrees using animal models or sire models.  That
package is still under development.  If you are particularly anxious
to use those methods you may want to contact Ana directly.

On Thu, Mar 27, 2008 at 7:40 AM, ian white <i.m.s.white at ed.ac.uk> wrote:
> The lmer function includes random terms as
>
>  (expression for a model matrix|grouping factor)
>
>  and I wonder how general the expression can be. For example, a pedigree
>  object can be converted to an A matrix (in the language of animal
>  breeding), but can the A matrix be incorporated into an lmer analysis?
>
>  I thought that
>
>  (chol(pedigree)|ones)
>
>  might be OK, where 'ones' is a constant vector of value 1. With the only
>  example I have tried, the syntax is accepted but the analysis ends with
>  a forced exit from R (core dump).
>
>
>  --
>   I White
>   University of Edinburgh
>   Ashworth Laboratories, West Mains Road
>   Edinburgh EH9 3JT  (Tel 0131 650 5490)
>
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