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Matlab plot in spherical coordinates

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sadra

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

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

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


Code Matlab M - [expand]
1
sphere



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

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


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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