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MathGroup Archive 1996

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Re: a question on ContourPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg4481] Re: a question on ContourPlot
  • From: Xah Lee <xah at best.com>
  • Date: Mon, 29 Jul 1996 02:37:31 -0400
  • Organization: Best Internet Communications
  • Sender: owner-wri-mathgroup at wolfram.com

David E. Burmaster wrote:
> I have made a complicated contour plot (on linear axes) that
>I would like to convert to semi-log axes....
> This does NOT work: 
>         Show[ plot/.{a_, b_} -> {a, Log[b]}]

Is the following what you wanted?

myContourData = ContourPlot[ Sin[x y], {x,1, 2}, {y,1,2},
AspectRatio->Automatic];0;

Show[
	(N@ Graphics@ myContourData) /.{x_?AtomQ, y_?AtomQ} -> {x, Log[y]},
AspectRatio->Automatic];0;

The key point is that you need to convert your contour data to graphic 
primitives with Graphics@ myContourData.

 Xah
 xah at best.com; 74631.731 at compuserve.com
 http://www.best.com/~xah/SpecialPlaneCurves_dir/specialPlaneCurves.html
 Mountain View, CA, USA

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