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Re: Principal component analysis [message #57150 is a reply to message #57148] Wed, 05 December 2007 06:30 Go to previous messageGo to previous message
David Fanning is currently offline  David Fanning
Messages: 11724
Registered: August 2001
Senior Member
Haje Korth writes:

> I am puzzled by principal component analysis. I calculated the eigenvalues
> using both PCOMP and IMSP_PRINC_COMP routines. Could someone enlighten me
> why the results are completely different? I have tried different keywords to
> see whether I can match them by trial and error, but I had no success. There
> must be someone out there who undertstands this much better than I do.

Did you read this article:

http://www.dfanning.com/code_tips/pca.html

I don't know what IMSP_PRINC_COMP is, but the article
will maybe help you come to terms with how different
PCA approaches might be different.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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