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Re: help to resolve a intricate equation [message #55742 is a reply to message #55649]

Sun, 09 September 2007 09:38

Sven Geier
Messages: 17
Registered: July 2002

Junior Member

kuyper wrote:
>
> I believe so. He indicated that the value of 'A' is known; it is 'X'
> that he describes as "a matrix to resolve". For scalars, the quadratic
> equation could be used to solve such an equation; but that doesn't
> work with matrices. I seem to remember learning an approach that can
> be used, but I don't remember what it was.

Oh, duh. You're right, of course: e did say that A was known.

I had taken the phrase "X,A are grid images" as indication that the poster
wasn't clear on how IDL handles math with arrays in the same way as
scalars. In this case, of course, this would be a quadratic equation to
solve, not the simple thing I wrote.

If we're talking real matrix algebra, then it isn't clear to me what
the "C+A" would be about: if C is a matrix then why is it called "a
constant", but if it isn't then "C+A" isn't really a valid operation. Hum.

-- S

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[Message index]

		help to resolve a intricate equation By: highstone on Tue, 28 August 2007 19:12
		Re: help to resolve a intricate equation By: Sven Geier on Sun, 09 September 2007 09:38
		Re: help to resolve a intricate equation By: James Kuyper on Sun, 09 September 2007 06:48
		Re: help to resolve a intricate equation By: Sven Geier on Sat, 08 September 2007 22:09

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