Plotting 3D parametric surfaces

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I'm trying to plot the following surfaces on matlab but I'm unsure how to go about it, especially where some have unknown parameters like in (a) how there are the variables a and b.

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Answer 1

Prabhan Purwar 2020-3-2

在 MATLAB Online 中打开

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Hi,

Variable a and b tends to be constants. Equation of ellipsoid as in your (a) part of the question is as follows:

x^2/a^2 + y^2/b^2 + z^2/c^2 = 1 .

Following code may help:

clc
close all
clear
a=1;
cb=2;
l=-3.14:0.1:3.14; %lemda
b=-3.14/2:0.1:3.14/2;
[X,Y]=meshgrid(l,b);
x=a.*cos(X).*cos(Y);
y=a.*sin(X).*cos(Y);
z=cb.*sin(Y);
r=surf(x,y,z);