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Re: ContourPlots

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  • Subject: [mg2041] Re: [mg2024] ContourPlots
  • From: John Fultz <jfultz>
  • Date: Sat, 16 Sep 1995 01:42:13 -0400

> I would like to know how to plot two ContourPlots (with Contours at 
> 0) into one plot. The command Show[plot1,plot2], where plot1 and 
> plot2 
> are defined as ContourPlots does not work, Also, the command 
> PLot[{f1,f2},{x,.,.},{y,.,.}], where f1 and f2 define two implicit 
> functions in x and y  does not work either. Is there a way that works 
> well?
> Thanks
> my email address is J.M.C.bouckaert at

Show[plot1,plot2] will work if set ContourShading->False in your original
plots.  It will never work with ContourShading->True in both plots (the
default behavior), and would be quite difficult to work around, since
Mathematica doesn't have the notion of "transparent" colors.

Implicit functions must be plotted with ImplicitPlot, defined in the
Graphics`ImplicitPlot` package.

John Fultz
Wolfram Research, Inc.

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