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MathGroup Archive 2005

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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}]\)
> 
> 
> 


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