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MathGroup Archive 1996

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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg4668] Re: --->What is the problem with 'ParametricPlot'?
  • From: dmourati at uiuc.edu (Demetri Mouratis)
  • Date: Thu, 22 Aug 1996 03:55:19 -0400
  • Organization: University of Illinois at Urbana
  • Sender: owner-wri-mathgroup at wolfram.com

In article <4ve8rf$iro at dragonfly.wolfram.com>, whoami at hknet.com (Seagull) wrote:

> 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.

Remove the braces from your x and y definitions.

In[4]:=
x=Sin[t]^3
y=Cos[t]^3
ParametricPlot[{x, y}, {t, 0, Pi/2}]
-------------------------------------------------------------------
Demetri Mouratis
dmourati at uiuc.edu
http://www.wolfram.com/~demetrim/

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