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MathGroup Archive 2006

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Re: 2nd attempt at post with corrected code

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69304] Re: 2nd attempt at post with corrected code
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Wed, 6 Sep 2006 04:28:16 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <edjg8p$lq8$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

T Harris wrote:
> Hello,
> 
> I have tried everything I know to get this code to look as it does in the 
> notebook.  I can't do it.  However, once it is copied and pasted in a 
> notebook, it works on my machine and looks like it originally did.  If it 
> doesn't work for anyone else, thanks for the try.  I can't remove my last 
> message.  This is my second attempt at this.  I am sorry others have tried 
> and been unable to help because of missing code.  If it doesn't work now, 
> thanks, and I won't try again to repost this.  There should be three parts 
> to the code.  If there is any type of error, please forget about it. 
> Thanks.
> 
> The two questions I had were (1) How do I find the planar area of the 
> ellipsoid? and (2) How do I identify what plane it plots out on?
> 
> In[1222]:=
> \!\(\(Clear[perpframe, r];\)\n
>   \(r = Random[Real, {\[Pi]\/4, \[Pi]\/2}];\)\n
>   \(s = Random[Real, {0, \[Pi]\/2}];\)\n
>   \(\(t = Random[Real, {\(-\(\[Pi]\/2\)\), \[Pi]\/2}];\)\(\n\)
>   \)\n
>   \(Clear[perpframe];\)\n
>   \(\({perpframe[1], perpframe[2],
>         perpframe[3]} = {{Cos[r]\ Cos[t] - Cos[s]\ Sin[r]\ Sin[t],
>           Cos[t]\ Sin[r] + Cos[r]\ Cos[s]\ Sin[t],
>           Sin[s]\ Sin[t]}, {\(-Cos[s]\)\ Cos[t]\ Sin[r] - Cos[r]\ Sin[t],
>           Cos[r]\ Cos[s]\ Cos[t] - Sin[r]\ Sin[t],
>           Cos[t]\ Sin[s]}, {Sin[r]\ Sin[s], \(-Cos[r]\)\ Sin[s],
>           Cos[s]}};\)\(\n\)
>   \)\n
>   \(ranger = 1.0;\)\n
>   \(frameplot =
>       Show[Table[
>           Arrow[perpframe[k], Tail \[Rule] {0, 0, 0},
>             VectorColor \[Rule] Indigo], {k, 1, 3}],
>         Graphics3D[Text["\<perpframe[1]\>", 0.5\ perpframe[1]]],
>         Graphics3D[Text["\<perpframe[2]\>", 0.5\ perpframe[2]]],
>         Graphics3D[
>           Text["\<perpframe[3]\>",
>             0.5\ perpframe[3]]], \[IndentingNewLine]Axes3D[ranger],
>         PlotRange \[Rule] {{\(-ranger\), ranger}, {\(-ranger\),
>               ranger}, {\(-ranger\), ranger}}, Boxed \[Rule] False,
>         Axes \[Rule] True, ViewPoint \[Rule] CMView,
>         AxesLabel \[Rule] {"\<x\>", "\<y\>", "\<z\>"}];\)\)

--> Show::"gcomb" : "An error was encountered in combining the graphics 
objects in << 1 >>. More...

> In[1230]:=
> 
> 
> {xstretch,ystretch,zstretch} = {1.5,0.8,0};
> ranger=1.5;
> {slow,shigh} = {0,Pi};
> {tlow,thigh} = {0,2 Pi};
> 
> hungellipsoidplot =
>     ParametricPlot3D[  xstretch   Sin[s]  Cos[t]  perpframe[1] +
>                        ystretch  Sin[s] Sin[t]  perpframe[2] +
>                        zstretch  Cos[s]perpframe[3], {s,slow,shigh},{t,tlow,
>         thigh},
> 
>       PlotRange->{{-ranger,ranger},{-ranger,ranger},{-ranger,ranger}},
>                 Axes->True,AxesLabel->{"x","y","z"},
>                 Boxed->False,ViewPoint->CMView,DisplayFunction->Identity];
> 
> setup =Show[hungellipsoidplot,frameplot,Axes3D[ranger],
>       DisplayFunction->$DisplayFunction];

--> ViewPoint::"nlist3" : "(CMView) is not a list of three numbers. More...

--> Show::"gcomb" : "An error was encountered in combining the graphics 
objects in [...snipped...]

> In[1236]:=
> 
> 
> Show[setup,ViewPoint->12 perpframe[1]]; 

-->  Show::"gtype" : "(Show) is not a type of graphics. More...

Jean-Marc


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