Prof Brian Ripley
ripley at stats.ox.ac.uk
Thu Nov 6 20:05:55 CET 2008
?princomp refers you to prcomp for that case:
'princomp' only handles so-called R-mode PCA, that is feature
extraction of variables. If a data matrix is supplied (possibly
via a formula) it is required that there are at least as many
units as variables. For Q-mode PCA use 'prcomp'.
On Thu, 6 Nov 2008, Noela Sánchez wrote:
> I need perform PCA analyst with a matrix with more variables than units.
> The princomp command don't match with this matrix.
> Anybody knows a good command to do it?
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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