Matlab plot in spherical coordinates

[sadra]

I want to know how to plot for example 1 (unit sphere) in theta=-pi/2 i/2 & phi=0:2×pi
Tnx

 

[weetabixharry]

I want to know how to plot for example 1 (unit sphere) in theta=-pi/2 i/2 & phi=0:2×pi
Tnx

This may sound like a joke, but it really is as simple as this:

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Code Matlab M - [expand]
1
sphere

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If you click on the code, it will take you to the reference page for Matlab's sphere function.

 

[weetabixharry]

If that doesn't give the insight you want, then you could write some code at a lower level. For example:

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Code Matlab M - [expand]
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close all; clear all; clc;
 
% Numbers of azimuth and elevation points
Ntheta = 100;
Nphi = 100;
 
% Azimuth and elevation grids
theta = linspace(0,2*pi,Ntheta);
phi = linspace(-pi/2,pi/2,Nphi);
 
% Compute (x,y,z) coordinates
x = zeros(Ntheta,Nphi);
y = zeros(Ntheta,Nphi);
z = zeros(Ntheta,Nphi);
for itheta = 1:Ntheta
    for iphi = 1:Nphi
        x(itheta,iphi) = cos(theta(itheta)).*cos(phi(iphi));
        y(itheta,iphi) = sin(theta(itheta)).*cos(phi(iphi));
        z(itheta,iphi) = sin(phi(iphi));
    end
end
 
% Plot
figure(); grid on;
surf(x,y,z);
shading interp;
axis equal;

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