[R] summary.manova and rank deficiency

[Simon Blomberg]

Sorry for reposting. I didn't receive any of the replies to my original message (must be an email problem at my end). I will read the responses in the archive.

Thanks!

Simon.

Simon Blomberg, PhD
Depression & Anxiety Consumer Research Unit
Centre for Mental Health Research
Australian National University
http://www.anu.edu.au/cmhr/
Simon.Blomberg at anu.edu.au  +61 (2) 6125 3379


> -----Original Message-----
> From: Simon Blomberg 
> Sent: Monday, 24 November 2003 9:09 AM
> To: R-help at stat.math.ethz.ch
> Subject: [R] summary.manova and rank deficiency
> 
> 
> Hi all,
> 
> I have received the following error from summary.manova:
> 
> Error in summary.manova(manova.test, test = "Pillai") : 
> 	residuals have rank 36 < 64
> 
> The data is simulated data for 64 variables. The design is a 
> 2*2 factorial with 10 replicates per treatment. Looking at 
> the code for summary.manova,  the error involves a problem 
> with qr(). Does anyone have a suggestion as to how to deal 
> with this error? The analysis works fine when there are only 
> 32 variables.
> 
> Thanks,
> 
> Simon.
> 
> Simon Blomberg, PhD
> Depression & Anxiety Consumer Research Unit
> Centre for Mental Health Research
> Australian National University
> http://www.anu.edu.au/cmhr/
> Simon.Blomberg at anu.edu.au  +61 (2) 6125 3379
> 
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