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Re: problem computing area [message #68134 is a reply to message #68129]

Mon, 05 October 2009 05:05

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

aetherlux writes:

> I am trying to compute the area of this figure with
> IDLanROI:ComputeGeometry
>
> http://juan.gulo.org/area2.png
>
> but I obtain a negative area. I have checked it and there is not lines
> crossing over others. For the "horizontal" part of the figure the line
> begins and finishes in negative values of "y" (that is, the first and
> last point), but is it a problem?
>
> Ideas? I have been looking at it all the weekend but I don't have any
> clue about the possible problem.

The code you are using is incorrect. :-)

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: problem computing area By: aetherlux on Mon, 05 October 2009 17:56
		Re: problem computing area By: jameskuyper on Mon, 05 October 2009 08:02
		Re: problem computing area By: David Fanning on Mon, 05 October 2009 05:05

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