comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » CONTOUR problem

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Contour Problem [message #39078 is a reply to message #7115]

Sat, 24 April 2004 04:39

Christopher Lee
Messages: 4
Registered: February 2001

Junior Member

On Fri, 23 Apr 2004 17:11:11 -0500, Jeff Patrick wrote:

> I keep getting the following error in my code and I can't figure out why.
> Any help would be appreciated.
>
> % Internal error: Triangulation is invalid.
>
> CONTOUR, X, Y, Z, IRREGULAR=1, ISOTROPIC=1, /CLOSED, /CELL_FILL, /OVERPLOT,
> .....
> each array is 32400 in size.
>
> Thank you,
>
> Jeff
> jeff.patrick@computer.org

Your getting the error because the contour function calls the triangulate
function internally, which throws an error on your data. If you can
separate the data from the Widget program, do it :) (save it to a file).

Then run TRIANGULATE on the data, if that throws an error, it probably
will, something is wrong with the data. e.g

There are identical points in the data, triangulate works (in a fluffy,
wordy kind of way) by drawing circles which have the points on the
circumference. If the points are identical, it can't work. (This would be
my guess).

There are colinear points which otherwise satisfy the Delauney
Triangulation algorithm, (good luck finding these). The triangle will be
'flat', i.e not a triangle. If this is going to happen, it would most
likely happen on the first three points, which are needed to bootstrap the
algorithm.

Chris.

Report message to a moderator

[Message index]

		CONTOUR problem By: Reginald Tang on Tue, 01 October 1996 00:00
		Re: Contour Problem By: btt on Mon, 26 April 2004 06:22
		Re: Contour Problem By: Christopher Lee on Sat, 24 April 2004 04:39
		Re: Contour Problem By: Jeff Patrick on Mon, 26 April 2004 09:04
		Re: Contour Problem By: James Kuyper on Mon, 26 April 2004 11:14
		Re: CONTOUR problem By: xiao zhang on Wed, 27 August 2008 07:09
		Re: CONTOUR problem By: David Fanning on Wed, 27 August 2008 07:14
		Re: CONTOUR problem By: xiao zhang on Wed, 27 August 2008 07:02
		Re: CONTOUR problem By: David Fanning on Wed, 27 August 2008 07:13
		Re: CONTOUR problem By: Wox on Wed, 27 August 2008 01:06
		Re: CONTOUR problem By: xiao zhang on Wed, 27 August 2008 08:02
		Re: CONTOUR problem By: Wox on Wed, 27 August 2008 08:00
		Re: CONTOUR problem By: David Fanning on Wed, 27 August 2008 07:51
		Re: CONTOUR problem By: xiao zhang on Wed, 27 August 2008 07:41
		Re: CONTOUR problem By: xiao zhang on Wed, 27 August 2008 07:16
		Re: Contour Problem By: David Fanning on Mon, 25 July 2011 11:13

Previous Topic:	Contour Problem
Next Topic:	TIMEGEN bug (not the pre-6.4 bug that Fanning describes)

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Oct 12 03:52:30 PDT 2025

Total time taken to generate the page: 1.28018 seconds