[R] pca

Martin Wegmann wegmann at biozentrum.uni-wuerzburg.de
Wed Apr 30 11:40:40 CEST 2003

I tried to compute a PCA of values derived from satellite imagery but
with princomp I get the following output:

>  pca.late <- princomp(late, na.action=na.fail)
Error in cov.wt(z) : x must contain finite values only>

the datasets are values from satellite imagery, therfore I assume they
are finite. But if not is there a way to minimize the decimal place?

I tried prccomp as well but I don't understand this output at all and I
can't add "na.action=na.pass" what I thought could be the problem.

Error in svd(x, nu = 0) : NA/NaN/Inf in foreign function call (arg 1)

any idea how to fix it?

thanks in advance, cheers Martin

Martin Wegmann
Department of Animal Ecology and Tropical Biology
Zoology III, Biocenter
Am Hubland
97074 Würzburg
wegmann at biozentrum.uni-wuerzburg.de
m.wegmann at web.de

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