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Re: [mg4659] >What is the problem with 'ParametricPlot'?
Posted:
Aug 25, 1996 6:05 PM


Remove the curly braces {} from the assignments for x and y and all will be well.
e.g., x = Sin[t]^3 y = Cos[t]^3
which mean the same thing as
x = (Sin[t])^3 y = (Cos[t])^3 To: mathgroup @ smc.vnet.net @ INTERNET cc: (bcc: Chee Lim Cheung/MS/SP_SF) From: whoami @ hknet.com (Seagull) @ INTERNET @ SP_SD Date: 22/08/96 03:55:12 AM Subject: [mg4659] >What is the problem with 'ParametricPlot'?
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.



