Re: sinosidal circle equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg29911] Re: sinosidal circle equation*From*: "Orestis Vantzos" <atelesforos at hotmail.com>*Date*: Wed, 18 Jul 2001 02:08:52 -0400 (EDT)*Organization*: National Technical University of Athens, Greece*References*: <9iomai$i0l$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

ParametricPlot[(R1 + R2 Sin[(L/2) t]^2){Cos[t], Sin[t]}, {t, 0, 2Pi}] will produce a "wavy circle" with inner radius R1, outer radius R2 and L "leaves". Orestis "Dr. Jasjit Suri" <jsuri at mr.marconimed.com> wrote in message news:9iomai$i0l$1 at smc.vnet.net... > Hi, > > I generated a flower image like this: > d = sqrt((x0-x)^2 + (y-y0)^2) > r = Constant*[cos(angle)]^2......................imp. > if (d <= r) { HIGH value} else{LOW value} > > this gives me a flower image. > > i would like to generate a smooth sine wave pattern > around the circle..... The wavy circle should go in and out.. > > Is there a std. equation of this curve ? > > thanks. > jas > > > >