Re: Re: Plotting a super ellipse

*To*: mathgroup at smc.vnet.net*Subject*: [mg55164] Re: [mg55142] Re: Plotting a super ellipse*From*: Clifford Martin <camartin at snet.net>*Date*: Tue, 15 Mar 2005 00:21:48 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Hmm, that's funny it generated a plot nicely in my version. Windows 2000, Mathematica, 5.0.1 Cliff --- JC <Eat at joes.com> wrote: > On Sun, 13 Mar 2005 10:20:38 +0000 (UTC), Peter Pein > <petsie at arcor.de> > wrote: > > >JC wrote: > > > >> I am trying to get Mathematica to plot a super > ellipse. The formula > >> is (x^2.5/1) + (y^2.5/1.25^2.5) = 20. > >> > >> I am getting error messages such as the "not a > list of real numbers" > >> or "protected symbols" > >> > >> Can some one help me out or point me in the right > direction to find > >> the help? > >> > >> I should mention I am brand new to Mathematica, I > downloaded the trial > >> version yesterday. I have read through the > tutorials and tried > >> googling for help but I am coming up blank. > >> > >Hi JC, > > > > use ImplicitPlot to plot implicitely ;-) and Abs[] > to avoid imaginary > >Parts (e.g. (-1)^(2.5)) > > > >ImplicitPlot[Abs[(x^2.5) + (y^2.5/1.25^2.5)] == > 20., {x, -4, 4}, {y, -5, 5}] > > Peter, > > Thank you very much for taking the time to reply. > > Your suggestion, while not generating an error > message, also did not > plot. This is what it returned: > > ImplicitPlot[ > Abs[x\^2.5` + 0.5724334022399462`\ y\^2.5`] == > 20.`, {x, \(-4\), > 4}, {y, \(-5\), 5}]\) > > >