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Re: IDL 8.0 Contour function artifact [message #72563 is a reply to message #72561]

Fri, 24 September 2010 10:47

MC
Messages: 50
Registered: September 1996

Member

On Sep 25, 4:44 am, Paul <paulsta...@gmail.com> wrote:
> I've noticed an irritating - I'm going to say it's an artifact - in
> the new contour function. Take
>
> myData = [[32.7759, 30.8012, 27.8589, 24.6717, 22.2133, 20.4595,
> 19.0960, 18.1344, 17.4240, 16.8068, 16.2542], $
> [19.7536, 18.1935, 16.3065, 14.5951, 13.7175, 13.4065, 13.3468,
> 13.6542, 14.1716, 14.7347, 15.3102]]
> CONTOUR, myData
> !null = CONTOUR(myData)
>
> You get it, too? Ideas? (If you're not seeing it, the contour function
> on my machines here creates a bit of a jagged mess, while the contour
> procedure plots nice, smooth lines.)

Correctly contouring such a 'narrow' data set is problematic, if you
pad the edges by replication, does the output improve? I'm not sure
but I suspect the problem may be related to the inability to define
contour curvature when the data is just 2 elements wide?

Hope this helps.

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[Message index]

		Re: IDL 8.0 Contour function artifact By: R.G.Stockwell on Fri, 24 September 2010 15:39
		Re: IDL 8.0 Contour function artifact By: MC on Fri, 24 September 2010 10:47
		Re: IDL 8.0 Contour function artifact By: David Fanning on Fri, 24 September 2010 10:40
		Re: IDL 8.0 Contour function artifact By: Paul Van Delst[1] on Fri, 24 September 2010 09:58
		Re: IDL 8.0 Contour function artifact By: Paul[3] on Sat, 25 September 2010 07:55

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