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Re: Other bug in ContourPlot

• To: mathgroup at smc.vnet.net
• Subject: [mg81699] Re: [mg81653] Other bug in ContourPlot
• From: Carl Woll <carlw at wolfram.com>
• Date: Tue, 2 Oct 2007 05:26:16 -0400 (EDT)
• References: <200710010837.EAA22116@smc.vnet.net>

Miguel 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.
>
>  
>
The contour plot in question is:

sol = x^2/9 + y^2/16 - 25

ContourPlot[sol == 0, {x, -6, 6}, {y, -6, 6}]

The above contour plot produces an empty graphic because there are no 
points in the given rectangle that satifsfy the equation sol==0.

Carl Woll
Wolfram Research

• References:
  • Other bug in ContourPlot
    • From: Miguel <misvrne@gmail.com>