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Re: Iso-contours at maximum/minimum levels [message #64966 is a reply to message #64872]

Mon, 02 February 2009 04:14

Gianluca Li Causi
Messages: 21
Registered: August 2005

Junior Member

Dear all,
I thanks you for the interesting discussione and I agree with David
that the word "contour" means a line that "encloses something", but
still you've not given indications for a working "imprint" function,
which is what I need.

The best that I've found, when the function derivatives are
continuous, is to make the contour at level=0 of the partial
derivatives dz/dx and dz/dy, which effectively produce a nice
"imprint" line BUT also contains some extra lines, corresponding to
where one derivative is null but the other is not.

So one could take both the zero contours of the two derivatives and
say that the "imprint" line is the common curve among these two
contours (don't really know how to do this in practice).

In any case this does not work with not continuous derivatives, like
my first example.

How could I search if such an "imprint" function is available anywhere
in the IDL library of somebody? Is there an IDL libraries database
somewhere in the internet?

Cheers
Gianluca

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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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