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Re: IDL 8.0 Contour function artifact [message #72565 is a reply to message #72564]

Fri, 24 September 2010 09:58

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

yes I see it. Ugh. It looks like the NG contour is generating extra points in the contour lines that are the source of
the jaggy-ness. If you take out every second point (and squint a bit) in the NG output, the contours appear to agree
with the smoother DG output.

Vierd.

Paul 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.)

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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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