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Re: Matrix algebra and index order, A # B vs A ## B [message #79723 is a reply to message #79655]

Tue, 27 March 2012 06:27

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Craig Markwardt writes:

> My understanding is that
> ## - is what you should always use for standard matrix multiplication (array-array or array-vector)
> # - is what you should use when ## doesn't work right.

I'm relieved to know Craig and I are on the same page here!
There are times when you start fooling around with this
stuff and you think you are going crazy. ;-)

Cheers,

David

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

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[Message index]

		Matrix algebra and index order, A # B vs A ## B By: Mats Löfdahl on Mon, 26 March 2012 04:33
		Re: Matrix algebra and index order, A # B vs A ## B By: Mats Löfdahl on Wed, 28 March 2012 03:45
		Re: Matrix algebra and index order, A # B vs A ## B By: Mats Löfdahl on Thu, 05 April 2012 07:55
		Re: Matrix algebra and index order, A # B vs A ## B By: David Fanning on Tue, 27 March 2012 06:27
		Re: Matrix algebra and index order, A # B vs A ## B By: Craig Markwardt on Tue, 27 March 2012 06:11
		Re: Matrix algebra and index order, A # B vs A ## B By: Mats Löfdahl on Tue, 27 March 2012 00:45
		Re: Matrix algebra and index order, A # B vs A ## B By: Craig Markwardt on Mon, 26 March 2012 15:41
		Re: Matrix algebra and index order, A # B vs A ## B By: David Fanning on Mon, 26 March 2012 07:35
		Re: Matrix algebra and index order, A # B vs A ## B By: Mats Löfdahl on Thu, 05 April 2012 10:29
		Re: Matrix algebra and index order, A # B vs A ## B By: Kenneth P. Bowman on Thu, 05 April 2012 09:48
		Re: Matrix algebra and index order, A # B vs A ## B By: David Fanning on Thu, 05 April 2012 08:22

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