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Conditional Plotting

• To: mathgroup at smc.vnet.net
• Subject: [mg85362] Conditional Plotting
• From: luko <lewkow at ariel.ac.il>
• Date: Thu, 7 Feb 2008 04:48:35 -0500 (EST)

New to Mathematica..
I would like to plot a function of x and y similar to a DensityPlot, but filled (black) if f(x,y)>0, and not filled for f(x,y)<0. 
I use Mathematica 4.2.
Thanx