comp.lang.idl-pvwave archive: archive » Re: Principal component analysis

Home » Public Forums » archive » Re: Principal component analysis

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Principal component analysis [message #57146 is a reply to message #57145]

Wed, 05 December 2007 06:49

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Haje Korth writes:

> I read your article three times to not embarass myself here. (I am omitting
> the smiley here) IMSL_PRINC_COMP is part of the IDL Analyst library. I dug a
> little further and this is what I found the IMSL routine gives the same
> eigenvectors as obtained form EIGENQL(a). However, in PCOMP the call to get
> the eigenvalues is EIGENQL(CORRELATE(a)). So which set is the correct one to
> use?

Don't know. You will have to ask someone whose last math
class wasn't over 30 years ago. :-)

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.")

Report message to a moderator

[Message index]

		Re: Principal component analysis By: Haje Korth on Wed, 05 December 2007 08:13
		Re: Principal component analysis By: Haje Korth on Wed, 05 December 2007 08:12
		Re: Principal component analysis By: Vince Hradil on Wed, 05 December 2007 08:13
		Re: Principal component analysis By: Haje Korth on Wed, 05 December 2007 08:47
		Re: Principal component analysis By: Haje Korth on Wed, 05 December 2007 08:08
		Re: Principal component analysis By: Mort Canty on Wed, 05 December 2007 07:24
		Re: Principal component analysis By: Vince Hradil on Wed, 05 December 2007 07:14
		Re: Principal component analysis By: Vince Hradil on Wed, 05 December 2007 07:12
		Re: Principal component analysis By: David Fanning on Wed, 05 December 2007 06:57
		Re: Principal component analysis By: David Fanning on Wed, 05 December 2007 06:49
		Re: Principal component analysis By: Haje Korth on Wed, 05 December 2007 06:36
		Re: Principal component analysis By: David Fanning on Wed, 05 December 2007 06:30
		Re: Principal component analysis By: David Fanning on Wed, 05 December 2007 08:25

Previous Topic:	Pointers problem - Unable to dereference NULL pointer
Next Topic:	IDL7 Paths, again

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 09 21:05:46 PDT 2025

Total time taken to generate the page: 1.35839 seconds