Re: Incorrect plotting of Lissajous-figures
- To: mathgroup at smc.vnet.net
- Subject: [mg25902] Re: Incorrect plotting of Lissajous-figures
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 7 Nov 2000 23:04:53 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <8u8dmk$7dd@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
ParametricPlot[] is *not* adaptive like Plot[].
You must give an appropriate number of PlotPoints and
ParametricPlot[{Cos[500t], Cos[500t + Pi/4]}, {t, 0, 2Pi}, PlotPoints ->
2000]
look as expected.
Regards
Jens
Rene Meyer wrote:
>
> Hello,
>
> while using Mathematica 4.0.2.0 to plot a Lissajous-figure with
>
> ParametricPlot[{Cos[500t], Cos[500t + Pi/4]}, {t, 0, 2Pi}]
>
> I found that with growing coefficients of t the figure (which should
> be a ellipse with an angle of 45 degrees between its longer main axis and
> the x axis) have the effect of filling up the whole ellipse with
> points. Is this an effect of rounding errors or is this a bug in
> mathematica?
>
> --
> Rene Meyer
> Student of Physics - Chemnitz University of Technology