[R] pca with missing values

[Prof Brian Ripley]

On Wed, 30 Jun 2004, Angel Lopez wrote:

> I need to perform a principal components analysis on a matrix with 
> missing values.
> I've searched the R web site but didn't manage to find anything.

    ?princomp

has a description of an na.action argument, and 

    help.search("missing values")

comes up with several relevant entries.

-- 
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