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How display negative contours with dashed lines?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg16865] How display negative contours with dashed lines?
  • From: WOOD DAVID M <dmwood at slate.Mines.EDU>
  • Date: Thu, 1 Apr 1999 21:35:30 -0500
  • Organization: Colorado School of Mines
  • Sender: owner-wri-mathgroup at wolfram.com

Howdy all.

  Despite rooting around like a cyber-pig after Mathematica truffles
(with DejaNews, AltaVista, and on MathSource), I can find no
suggestions or even mention of something that I suspect isn't hard to
do [except for me :)]

I'd like to produce contour plots for which NEGATIVE function values
are indicated as dashed lines, while other values use solid lines.

Can anyone suggest how I can on-the-fly specify ContourStyle options
that will display negative contour values (say in ContourPlot or
ListContourPlot) as *dashed* lines, via (e.g.) Dashing [or in any
other way]?

Many thanks!
-- 
David M. Wood
Department of Physics, Colorado School of Mines, Golden, CO 80401
Phone: (303) 273-3853; Fax: (303) 273-3840
e-mail: dmwood at physics.Mines.EDU ; NeXTMail welcome


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