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Re: ParametricPlot Question

  • To: mathgroup at
  • Subject: [mg37147] Re: ParametricPlot Question
  • From: Tom Burton <tburton at>
  • Date: Sun, 13 Oct 2002 05:56:32 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

On 10/12/02 2:11 AM, in article ao8p0o$bp5$1 at, "Charles Morgan"
<charlesmorgan at> wrote:

> I would like to mark representative samples of t on a parametric plot,
> where t is the third parameter.  For example, how could I mark the 8
> values t=0, t=Pi/4, ..., t=7Pi/4  on the plot generated by:
> ParametricPlot[{Sin[t],  Cos[t]}, {t, 0, 2Pi}]

One way is to use Epilog:

ParametricPlot[{Sin[t], Cos[t]}, {t, 0, 2*Pi},
  Epilog -> {PointSize[0.02],
    Table[With[{p = {Sin[t], Cos[t]}}, {Point[p],Text[t, p, -1.5*p]}],
     {t, Pi/4, 7*(Pi/4), Pi/4}]}, PlotRange -> All]

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