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Student Support Forum: '3D Graphing of Quadric Surfaces' topicStudent Support Forum > General > Archives > "3D Graphing of Quadric Surfaces"

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Peter Marsh
11/29/03 01:56am

I'm sure you have already received an answer, but I have the same sort of problem. I can get Mathematica to graph ellipsoids, paraboloids, and hyperbolic paraboloids, but so far no luck with hyperboloids or elliptic cones (here x,y,and z are all second power.)
To graph an ellipsoid, you have to use the ParametricPlot3D function. Here is the input:

ParametricPlot3D[{5Cos[\[Phi]]Cos[\[Theta]], 3Sin[\[Phi]]Cos[\[Theta]],
2Sin[\[Theta]]}, {\[Phi], 0, 2\[Pi]}, {\[Theta], -\[Pi]/2, \[Pi]/2}]

This uses a conversion of the original equation to spherical coordinates, but apparently the coordinate system in Mathematica is defined differently from that used in my calculus book. (Anton - 6th edition)

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Thread '3D Graphing of Quadric Surfaces' is now CLOSED
Author Date Posted
3D Graphing of Quadric Surfaces J Chiu 09/29/98 07:25am
Re: 3D Graphing of Quadric Surfaces Peter Marsh 11/29/03 01:56am
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