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Re: ContourPlot problem

  • To: mathgroup at
  • Subject: [mg15531] Re: ContourPlot problem
  • From: Paul Abbott <paul at>
  • Date: Mon, 18 Jan 1999 23:47:30 -0500
  • Organization: University of Western Australia
  • References: <77uukf$>
  • Sender: owner-wri-mathgroup at

Pedro A Santos wrote:

> When I give the command
> ContourPlot[(1-Exp[-1/((x)^2+(y)^2)/10]),{x,-1.0,1.0},{y,-1.0,1.0},
>   PlotPoints ->{50,50},
>   Contours -> {.1,.2,.3,.4,.5,.6,.7,.8,.9,.99, .99999999},
>   ContourShading ->False]
> I get what would be to expect, i.e. all the contours. But if I change
> slightly the domain,
> say  "{x,-1.1,1.1},{y,-1.1,1.1}", the majority of the contours
> disappear. And they do not appear even if I increase PlotPoints to 200> or more.
> Does anybody know the reason of this strange behaviour? And how to
> avoid it?

Mathematica automatically choses the PlotRange.  If you set
PlotRange->All you will see all the contours in both cases.


Paul Abbott                                   Phone: +61-8-9380-2734
Department of Physics                           Fax: +61-8-9380-1014
The University of Western Australia            Nedlands WA  6907
mailto:paul at  AUSTRALIA

            God IS a weakly left-handed dice player

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