[Rd] prcomp need Conj(t(s$vt)) (PR#2924)
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon May 5 20:19:36 MEST 2003
On Mon, 5 May 2003 pgilbert at bank-banque-canada.ca wrote:
> In prcomp
> s <- La.svd(x, nu = 0)
> s$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 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
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