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Re: Iso-contours at maximum/minimum levels [message #64889 is a reply to message #64881]

Thu, 29 January 2009 08:15

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Gianluca Li Causi writes:

> In order to find the iso-value lines of a 2D surface I'm using the
> CONTOUR procedure, which works very well except that it's NOT ABLE to
> compute the contour when the LEVEL equals the maximum or minimum of
> the function.
>
> I've the following simple fuction:
> Z = shift(dist(100, 100), 50,50)
> Z = abs(Z - max(Z)*.3)
> which have a circular minimum at LEVEL=0, but CONTOUR is unable to
> find it!

Wow! That is one perverse example!

Let me know what you come up with. I'll include it in
the Monsters of IDL Exhibit I'm planning. :-)

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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[Message index]

		Re: Iso-contours at maximum/minimum levels By: pgrigis on Fri, 30 January 2009 11:00
		Re: Iso-contours at maximum/minimum levels By: David Fanning on Fri, 30 January 2009 07:48
		Re: Iso-contours at maximum/minimum levels By: pgrigis on Fri, 30 January 2009 07:36
		Re: Iso-contours at maximum/minimum levels By: David Fanning on Fri, 30 January 2009 07:21
		Re: Iso-contours at maximum/minimum levels By: Jeremy Bailin on Fri, 30 January 2009 07:04
		Re: Iso-contours at maximum/minimum levels By: pgrigis on Thu, 29 January 2009 15:14
		Re: Iso-contours at maximum/minimum levels By: David Fanning on Thu, 29 January 2009 14:51
		Re: Iso-contours at maximum/minimum levels By: David Fanning on Thu, 29 January 2009 08:15
		Re: Iso-contours at maximum/minimum levels By: Gianluca Li Causi on Mon, 02 February 2009 04:14

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