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problem with TRIANGULATION option in CONTOUR [message #73053]

Sat, 23 October 2010 05:35

Ardhuin
Messages: 5
Registered: October 2010

Junior Member

Dear all,
I have been having problems with plotting output of a numerical model
that uses unstructured grids using IDL: this model computes wave
heights in the ocean. If I use the set of triangles from the model, I
get really funny errors:
Out of range subscript encountered: <LONG Array[66453]>.
although I only have 9626 points and about 16000 triangles.

The command I use is
CONTOUR,tablep,x,y,$
xstyle=5,ystyle=5,/FOLLOW,/CELL_FILL, TRIANGULATION=tri,
$
C_COLOR=colorind(0:c_numlev-2+addmini+addmaxi), $
LEVELS=lev,/
NOERASE,TITLE=title,CLIP=[rangex(0),rangey(0),rangex(1),rang ey(1)], $
XRANGE=rangex,YRANGE=rangey,MAX_VALUE=maxval, $
POSITION=[blx*winx/mwinx,bly*winy/mwiny,trx*winx/
mwinx,try*winy/mwiny]

Where tablep , x and y
If I first do TRIANGULATE,X,Y,tri then the contours comes out OK...
but they cut out through land boundaries and islands.

So I was thinking: my triangles must be wrong ...
but if I do a TRIGRID with my triangles then I can plot nicely with
TV ...
array=trigrid(X,Y,tablep,tri,[dx,dy],
[rangex(0),rangey(0),rangex(1),rangey(1)], $
MAX_VALUE=maxval)

So my triangles are OK for TRIGRID but not for CONTOUR... How is that
possible ??

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[Message index]

		problem with TRIANGULATION option in CONTOUR By: Ardhuin on Sat, 23 October 2010 05:35
		Re: problem with TRIANGULATION option in CONTOUR By: David Fanning on Tue, 26 October 2010 06:52
		Re: problem with TRIANGULATION option in CONTOUR By: Ardhuin on Tue, 26 October 2010 06:34
		Re: problem with TRIANGULATION option in CONTOUR By: David Fanning on Tue, 26 October 2010 05:18
		Re: problem with TRIANGULATION option in CONTOUR By: ben.bighair on Tue, 26 October 2010 04:31
		Re: problem with TRIANGULATION option in CONTOUR By: Ardhuin on Mon, 25 October 2010 23:04
		Re: problem with TRIANGULATION option in CONTOUR By: David Fanning on Mon, 25 October 2010 17:54
		Re: problem with TRIANGULATION option in CONTOUR By: ben.bighair on Mon, 25 October 2010 17:29
		Re: problem with TRIANGULATION option in CONTOUR By: David Fanning on Mon, 25 October 2010 15:17

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