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How to plot a surface in its parametric form ?

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Loris Chavée
Loris Chavée 2017-2-10
回答： José-Luis 2017-2-10
Hello,
I have à problem when I try to plot a surface that has this form for exemple:
0=<r=<infinite
0=<t=<2*pi
x=r*cos (t)
y=r*sin (t)
z=(r^3)/6
This is the surface il want to plot but the value in z bother me. Indeed I can't use meshgrid because of that.
What can I do?
Thanks for your help !

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采纳的回答

KSSV
KSSV 2017-2-10
clc; clear all ;
M = 100 ; N = 100 ;
rinf = 100 ; % take rinf how big you want
r = linspace(0,rinf,M) ;
t = linspace(0,2*pi,N) ;
[R T] = meshgrid(r,t) ;
X = R.*cos(T) ;
Y = R.*sin(T) ;
Z = R.^3/6 ;
surf(X,Y,Z) ;

更多回答（1 个）

José-Luis
José-Luis 2017-2-10
You don't need to use meshgrid() if you have the symbolic math toolbox.
See plotfunc3d.

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