[R-sig-eco] [R-sig-phylo] GEE and AIC

[Simon Blomberg]

On Mon, 2008-06-02 at 15:34 +0200, Emmanuel Paradis wrote:
[snip]

> R> model.matrix(~ x)[, -1]
>    x2 x3 x4
> 1  0  0  0
> 2  0  0  0
> 3  1  0  0
> 4  1  0  0
> 5  0  1  0
> 6  0  1  0
> 7  0  0  1
> 8  0  0  1

Or even just model.matrix(~ x-1)

Simon.

-- 
Simon Blomberg, BSc (Hons), PhD, MAppStat. 
Lecturer and Consultant Statistician 
Faculty of Biological and Chemical Sciences 
The University of Queensland 
St. Lucia Queensland 4072 
Australia
Room 320 Goddard Building (8)
T: +61 7 3365 2506
http://www.uq.edu.au/~uqsblomb
email: S.Blomberg1_at_uq.edu.au

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