[R] Loading Distance matrices and PCA

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Sep 11 18:33:12 CEST 2003

On Thu, 11 Sep 2003 diriano at rz.uni-potsdam.de wrote:

> I am really new into R, and I would like to know if it is possible to load a
> distance file matrix (lower-triangular) into R and then do a PCA or
> Multidimensional Scaling over that matrix.

No, yes, as PCA is not defined for a distance matrix but MDS is.

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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