From ripley at stats.ox.ac.uk  Mon May  5 20:19:36 2003
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Mon May  5 20:19:48 2003
Subject: [Rd] prcomp need Conj(t(s$vt)) (PR#2924)
In-Reply-To: <200305051814.h45IEN2b016635@pubhealth.ku.dk>
Message-ID: <Pine.LNX.4.44.0305051915440.29159-100000@gannet.stats>

On Mon, 5 May 2003 pgilbert@bank-banque-canada.ca wrote:

> In prcomp
> 
>         s <- La.svd(x, nu = 0)
>         s$v <- t(s$vt)
> 
> the second above line should be 
> 
>         s$v <- Conj(t(s$vt))
> 
> (to cover complex cases).

They are not covered in the help page, AFAICS.

They are certainly not covered in the references quoted.

Are you not jumping to conclusions?  There is a lot of R that does not 
handle complex cases, and does not say so. (lm, for one.)

-- 
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)
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[Rd] prcomp need Conj(t(s$vt)) (PR#2924)
Prof Brian Ripley