Re: [Rd] R: prcomp documentation (PR#7372)

From: Prof Brian Ripley <>
Date: Wed 17 Nov 2004 - 20:31:55 EST

I have no idea what you mean by this. prcomp works on a matrix, which has two dimensions, and what you mean by `dimensionality of the data' in PCA depends on whether you are doing R mode or Q mode PCA.

Have you read the references on the help page?

On Wed, 17 Nov 2004 wrote:

> help(prcomp) documentation doesn't say that dimensionality of the data treated
> is number of columns of the matrix. I suggest this to be added somewhere near
> the description of the matrix argument 'x'.

Brian D. Ripley,        
Professor of Applied Statistics,
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 Wed Nov 17 20:37:57 2004

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