Re: [R] Changing predictor order in lm()

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Sun 19 Feb 2006 - 23:43:41 EST

RSiteSearch("keep.order") gave me

http://finzi.psych.upenn.edu/R/Rhelp02a/archive/14240.html

which has such an example, and points out another example is in demo(glm.vr).

On Sun, 19 Feb 2006, Andrew Robinson wrote:

> Dear community,
>
> can anyone provide a snippet of code to force the lm() to fit a model with
> terms in the formula in an arbitrary order? I am interested in something
> like:
>
> lm(y ~ A * B + C, data=data)
>
> where the interaction of A and B should be in the formula before C. My
> goal is to simplify my presentation of models using the anova() statement.
> I have found that this should be possible using the terms.formula()
> function, but if anyone has an example that would be much appreciated.
>
> Cheers
>
> Andrew
>
>
> Andrew Robinson
> Senior Lecturer in Statistics Tel: +61-3-8344-9763
> Department of Mathematics and Statistics Fax: +61-3-8344 4599
> University of Melbourne, VIC 3010 Australia
> Email: a.robinson_at_ms.unimelb.edu.au Website: http://www.ms.unimelb.edu.au
>
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-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Mon Feb 20 00:09:11 2006

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