[R-sig-ME] [R] lme nesting/interaction advice

Federico Calboli f.calboli at imperial.ac.uk
Mon May 12 16:25:12 CEST 2008

On 12 May 2008, at 12:21, Nick Isaac wrote:

> I *think* the syntax for the model Federico wants is this:
> lmer(y~selection*males+ (selection|month) + (males|month))

I'll try and check against some back of the envelope calculations -- 
as I said, the model is, per se, nothing really new, and my data is  
fully balanced.

> My lme syntax is a bit rusty, so I'm not confident how to recode  
> with nested random effects, as in P&B p24.
> Two quick points:
> 1. I think Federico has caused some confusion on account of the way  
> he used the term 'crossing'

Sorry about that, I'll try to avoid causing such confusion in the  



Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG

Tel +44 (0)20 75941602   Fax +44 (0)20 75943193

f.calboli [.a.t] imperial.ac.uk
f.calboli [.a.t] gmail.com

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