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MathGroup Archive 2004

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Re: Parametric Plot.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47808] Re: Parametric Plot.
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Tue, 27 Apr 2004 04:47:49 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

On 4/26/04 at 2:40 AM, ronnyma at student.matnat.uio.no (Ronny Mandal)
wrote:


>When I give Mathematica 5 stud. ver. the input
>ParametricPlot[Sin[t], Cos[t],{t,0,2Pi}] i get a circle with the
>centre in the origin and radius=1.

>Any suggestions how to write the circle in this form: { (x,y)| 0 <=
>x, y <= 1 }, i.e "all points in 2D-space that satisfies this
>equation.

The set of points that satisfies 0 <= x and y <= 1 isn't a circle.

If what you want is a shaded circle with radius 1 centered on the origin then try

<<Graphics`FilledPlot`
FilledPlot[{-Sqrt[1-x^2], Sqrt[1-x^2]}, {x, -1, 1}, AspectRatio->1];

Alternatively you could create this with graphics primatives.
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