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MathGroup Archive 1996

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--->What is the problem with 'ParametricPlot'?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg4659] --->What is the problem with 'ParametricPlot'?
  • From: whoami at hknet.com (Seagull)
  • Date: Thu, 22 Aug 1996 03:55:12 -0400
  • Organization: HKNet Co Ltd.
  • Sender: owner-wri-mathgroup at wolfram.com

I input the followings:
x={Sin[t]}^3
y={Cos[t]}^3
ParametricPlot[{x, y}, {t, 0, Pi/2}]

And got the following outputs:
ParametricPlot::ppcom: 
   Function x cannot be compiled; plotting will proceed with the
     uncompiled function.
ParametricPlot::ppcom: 
   Function y cannot be compiled; plotting will proceed with the
     uncompiled function.
ParametricPlot::pptr: 
   x does not evaluate to a pair of real numbers at t = 0..
ParametricPlot::pptr: 
   x does not evaluate to a pair of real numbers at t = 0.0654498.
ParametricPlot::pptr: 
   x does not evaluate to a pair of real numbers at t = 0.1309.
General::stop: 
   Further output of ParametricPlot::pptr
     will be suppressed during this calculation.


Can anyone tell me what is wrong?
Thanks in advance!!

Seagull.


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