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MathGroup Archive 1998

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RE: Mathematica Plot [help]



Hi
One easy way to do it:

f[x_,y_] := Sin[x y] /; y <= 1 - x
f[x_,y_] := 0 /; y > 1 - x
Plot3D[f[x,y],{x,0,1},{y,0,1}]

Regards,

RF

-----Original Message-----
From:	Wei Xu [SMTP:wxu@cs.utexas.edu] To: mathgroup@smc.vnet.net
Sent:	Monday, January 05, 1998 9:25 PM To:	mathgroup@smc.vnet.net
Subject:	[mg10312] Mathematica Plot [help]

Hi,

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?

Thanks,

Regards,

Wei




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