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Re: Truth-Plot

• To: mathgroup@smc.vnet.net
• Subject: [mg10825] Re: Truth-Plot
• From: Allan Hayes <hay@haystack.demon.co.uk>
• Date: Tue, 10 Feb 1998 21:01:38 -0500
• References: <6bao7p$cbu@smc.vnet.net>

Veit Sanner wrote:
 
> How can I plot/evaluate the following equation in Mathematica 3.0?
> (x^2+y^3) MOD 4 < 2
> 
> In my HP48 I just choose 'Truth' as plotting style and it works, but I
> can't find any 'TruthPlot[]' in Mathematica.


ContourPlot[Mod[x^2+y^3 ,4 ], 
	{x,-3,3},{y,-3,3},
	Contours ->{2}, PlotPoints -> 50];

("True" is black)
PlotPoints -> 50 increases plot definition. Contours ->{2} causes the
contour at height 2 to be drawn.

-- 
Allan Hayes
Mathematica Training and Consulting
Leicester, UK
hay@haystack.demon.co.uk
http://www.haystack.demon.co.uk
voice: +44 (0)116 271 4198
fax: +44 (0)116 271 8642