i.pca

[Grass package]

igny-Giroux??at?Nov?22??95?04?03?26?pm at bnr.ca>
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> Does anyone know whether i.pca uses a correlation OR covariance matrix to
> generate the corresponding components? There is no reference to this in the
> manual and the results from r.covar and m.eigensystem are dramatically
> different depending on whether a correlation or covariance matrix was used.
> 
> Thanks.
> L.A. Dupigny-Giroux

Please send replies to this list, as I'm sure others are interested too.

        Martijn

P. Martijn van Leusen -------------------------------------------------------+
Leverhulme Research Fellow, The Wroxeter Hinterland Project                  |
University of Birmingham Field Archaeology Unit                              |
Edgbaston, Birmingham B15 2TT  Phone +44 121 414 5513  Fax +44 121 414 5516  |
E-mail P.M.van-Leusen at bham.ac.uk                                             |
URL http://www.bham.ac.uk/BUFAU/Staff/vanleupm.html__________________________|