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Re: Other bug in ContourPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81706] Re: [mg81653] Other bug in ContourPlot
  • From: DrMajorBob <drmajorbob at bigfoot.com>
  • Date: Tue, 2 Oct 2007 05:29:53 -0400 (EDT)
  • References: <12684416.1191251617663.JavaMail.root@m35>
  • Reply-to: drmajorbob at bigfoot.com

No bug. In the second ContourPlot, you used x and y ranges entirely WITHIN  
the ellipse, so the ellipse couldn't be seen.

sol = x^2/9 + y^2/16 - 25;
ContourPlot[sol == 0, {x, -20, 20}, {y, -20, 20}]

or

Show[ContourPlot[sol == 0, {x, -20, 20}, {y, -20, 20}],
  Graphics@{Red, Rectangle[{-6, -6}, {6, 6}]}]

Bobby

On Mon, 01 Oct 2007 03:37:02 -0500, Miguel <misvrne at gmail.com> wrote:

> If you run the ContourPlot a first time, it works fine. But, if you
> run ContourPlot again, the graphics previous or nothing is displayed.
>
> http://mathematicaes.googlegroups.com/web/ContourPlotBis.pdf
>
> The last version 6.0.1 is like a Gruyere chees: it is completed with
> innumerable holes.
>
>
>



-- 

DrMajorBob at bigfoot.com


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