       Re: Model the surface of an ellipsoid

• To: mathgroup at smc.vnet.net
• Subject: [mg93522] Re: Model the surface of an ellipsoid
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Thu, 13 Nov 2008 06:34:36 -0500 (EST)
• Organization: Uni Leipzig
• References: <gfgqib\$dm1\$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de

```Hi,

and

http://mathworld.wolfram.com/Ellipsoid.html

has no parametric or implicit equation for you ?
And you can't even download the notebook
http://mathworld.wolfram.com/notebooks/Surfaces/Ellipsoid.nb

??
Too bad

Regards
Jens

Mayneord wrote:
> Hi All,
>
> I am looking for a way to model the surface of an ellipsoid with
> Mathematica 5.2.
> To define the surface, i got an equation given below :
>
> E[r_,d_] = Sqrt[r^2/9 + d^2/9];
>
> Mathematica version of the above equation :
>
> \!\(\*
>   RowBox[{
>     RowBox[{\(E[r_, d_]\), "=",
>       SqrtBox[
>         StyleBox[\(r\^2\/3\^2 + d\^2\/3\^2\),
>           FontSlant->"Italic"]]}], ";"}]\)
>
> for example : the values of ' d ' ranges from -2 to 2 and ' r ' ranges
> from -3 to 3.
>
> Can somebody please tell me how to make a 3D ellipsoidal surface with
> this information?
>
> the aim is to place this ellipsoidal volume on one co-ordinate point
> of a 2D image and check if there is any intercept with x or y axis
> within this volume.
>
> i really don't know, just with this information, if it is possible to
> acheive the given task.
>
> I sincerely appreciate your generous solutions or suggestions.
>
>
>
> Mayneord.
>
>
>
>

```

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