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Re: Covariance Matrix [message #87937 is a reply to message #87936]

Tue, 04 March 2014 06:22

Matthew Argall
Messages: 286
Registered: October 2011

Senior Member

> My case is related to calculated the principle eigen vector for 5by5 pixel window, which can be represented by one vector only.

So, you have an array with 25 elements that can be represented by a 5x5 matrix and you want to diagonalize the matrix to get the eigenvalues and eigenvectors?

If this is what you are trying to do, there is an example with a 4x4 matrix on the Eigenvec help page
http://exelisvis.com/docs/EIGENVEC.html

I do not think you want the covariance of a single vector, but you would need to give a little more information to help further...

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[Message index]

		Covariance Matrix By: amin farhang on Sat, 07 December 2013 04:11
		Re: Covariance Matrix By: David Fanning on Sat, 07 December 2013 05:31
		Re: Covariance Matrix By: amin farhang on Sat, 07 December 2013 06:37
		Re: Covariance Matrix By: Matthew Argall on Sat, 07 December 2013 07:28
		Re: Covariance Matrix By: amin farhang on Sat, 07 December 2013 09:25
		Re: Covariance Matrix By: Matthew Argall on Sat, 07 December 2013 09:38
		Re: Covariance Matrix By: Matthew Argall on Sat, 07 December 2013 09:46
		Re: Covariance Matrix By: amin farhang on Sun, 08 December 2013 11:57
		Re: Covariance Matrix By: haval.js on Tue, 04 March 2014 05:44
		Re: Covariance Matrix By: Matthew Argall on Tue, 04 March 2014 06:22
		Re: Covariance Matrix By: haval.js on Wed, 05 March 2014 02:37
		Re: Covariance Matrix By: haval.js on Wed, 05 March 2014 02:38
		Re: Covariance Matrix By: haval.js on Wed, 05 March 2014 02:43
		Re: Covariance Matrix By: Matthew Argall on Wed, 05 March 2014 05:14
		Re: Covariance Matrix By: haval.js on Mon, 10 March 2014 03:11
		Re: Covariance Matrix By: haval.js on Wed, 05 March 2014 02:39
		Re: Covariance Matrix By: andrei.makeev on Mon, 28 September 2015 11:26

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