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MathGroup Archive 1998

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Re: Mathematica Plot [help]


  • To: mathgroup@smc.vnet.net
  • Subject: [mg10326] Re: Mathematica Plot [help]
  • From: Paul Abbott <paul@physics.uwa.edu.au>
  • Date: Thu, 8 Jan 1998 23:40:50 -0500
  • Organization: University of Western Australia
  • References: <68s834$5mq@smc.vnet.net>

Wei Xu wrote:

> I want to draw a surface, say sin[x,y],  defined on a triangular domain,
> say, x:[0,1], y:[0,1] and x+y <=1.
> I tried to use the following command:
>  ParametricPlot3D[{fx, fy, fz}, {x,0,1}, {y,0,1-x}] but it is not
> allowed to use {y,0,1-x}.

An answer for this appeared in The Mathematica Journal 5(1):15. Change
variables and reparametrise y:

	ParametricPlot3D[{x,u (1-x),Sin[x u (1-x)]},{x,0,1},{u,0,1}];

Here y -> u (1-x) and u:[0,1].

Cheers,
	Paul 

____________________________________________________________________ 
Paul Abbott                                   Phone: +61-8-9380-2734
Department of Physics                           Fax: +61-8-9380-1014
The University of Western Australia            Nedlands WA  6907       
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http://www.pd.uwa.edu.au/~paul

            God IS a weakly left-handed dice player
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