Re: Plotting a super ellipse
- To: mathgroup at smc.vnet.net
- Subject: [mg55142] Re: Plotting a super ellipse
- From: JC <Eat at joes.com>
- Date: Mon, 14 Mar 2005 03:43:41 -0500 (EST)
- References: <d0u71l$kno$1@smc.vnet.net> <d1145m$dp2$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
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}]\)