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MathGroup Archive 1998

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Mathematica Plot [help]


I'm learning Mathematica. 
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}.

Anybody can help me out?




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