i.pca

[Agustin Lobo]

"" ..and the results from r.covar and m.eigensystem are dramatically
> different depending on whether a correlation or covariance matrix was used.""

As it has to be. If I recall correctly, i.pca uses the covar matrix. If
you are using m.eigensystem it's not difficult to check out: use r.mapcalc
and the eigenvectors.

Agus

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Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Marti Franques s/n
08028 Barcelona (Spain)

tel. 34 3 330 2716
fax. 34 3 411 0012

alobo at ija.csic.es
alobo at eno.princeton.edu
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