Re: ContourPlot Problem

• To: mathgroup at smc.vnet.net
• Subject: [mg83106] Re: ContourPlot Problem
• From: "Kevin J. McCann" <Kevin.McCann at umbc.edu>
• Date: Sun, 11 Nov 2007 02:57:42 -0500 (EST)
• References: <fh3qip\$l1\$1@smc.vnet.net> <47357A63.1040807@gmail.com>

```Yes, but I actually want to specify the contours, and it won't do it.

Kevin

Jean-Marc Gulliet wrote:
> Kevin J. McCann wrote:
>
>> 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?
>
> Assuming I have correctly understood you, what you want is a hundred
> equally-spaced contour lines to be displayed. The following expression
> will do that:
>
> ContourPlot[V[0.9, x, z], {x, -L, L}, {z, -L, L}, Contours -> 100,
>  FrameLabel -> {"x", "z"}]
>
> Regards,

--

Kevin J. McCann
Research Associate Professor
JCET/Physics
University of Maryland, Baltimore County (UMBC)
1000 Hilltop Circle
Baltimore, MD 21250

```

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