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Re: ContourPlot Problem

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  • Subject: [mg83112] Re: ContourPlot Problem
  • From: "Steve Luttrell" <steve at>
  • Date: Sun, 11 Nov 2007 03:00:48 -0500 (EST)
  • References: <fh3qip$l1$>

This function has a singularity (e.g. V[\[Beta],0,0] is Indeterminate) so 
Mathematica is removing it from the range of values that are plotted.

You can manually override this behaviour in various ways, such as


which fills in some more contours for you, but of course still can't do the 
singularity itself.

Steve Luttrell
West Malvern, UK

"Kevin J. McCann" <Kevin.McCann at> wrote in message 
news:fh3qip$l1$1 at
>I am having a problem with the following code and that is that not all
> of the contours are plotted.
> \[Beta]=.
> x=.
> z=.
> V[\[Beta]_,x_,z_]:=1/Sqrt[x^2+z^2]1/Sqrt[1-\[Beta]^2x^2/(x^2+z^2)]
> cntrs=Table[c,{c,0.05,5,0.05}];
> L=6;
> ContourPlot[V[0.9,x,z],{x,-L,L},{z,-L,L},Contours->cntrs,FrameLabel->{"x","z"}]
> In fact if I set the contours to lie between 4 and 5, say, then no
> contours are plotted. Che pasa?
> Kevin
> -- 
> Kevin J. McCann
> Research Associate Professor
> JCET/Physics
> Physics Building
> University of Maryland, Baltimore County
> 1000 Hilltop Circle
> Baltimore, MD 21250

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