[R] Changing predictor order in lm()

[Andrew Robinson]

Thanks to Brian Ripley and Ernst Hansen for their kindly replies to my
question.

Cheers

Andrew


On Sun, February 19, 2006 11:43 pm, Prof Brian Ripley said:
> 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 at 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
>


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