Plotting antenna field patterns in spherical coordinates
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Hi, I have a 2D array which of the form A(theta, phi) and I want to plot A as a 3D surface. I have read advice which suggests to use the sph2cart function to convert to Cartesian coordinates, then use surf or mesh, but as size(A) = 46 90, i.e. it is not a square 2D array, it will not work. Any suggestions? Thanks
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Kelly Kearney
2011-7-21
Why do you think your array needs to be square? Mesh, surf, etc. will accept any gridded data. Assuming your A values represent the radius at any given theta and phi:
theta = linspace(0, pi, 90);
phi = linspace(0, 2*pi, 46);
[theta, phi] = meshgrid(theta, phi);
A = ones(size(theta));
[x,y,z] = sph2cart(theta, phi, A);
mesh(x,y,z)
Is this what you're after?
更多回答(2 个)
Ebrahim Forati
2020-6-10
Just added a couple of fixes to Kelley's answer:
theta = linspace(-pi/2, pi/2, 90); % theta is w.r.t. xy plane
phi = linspace(0, 2*pi, 46);
[theta, phi] = meshgrid(theta, phi);
A = ones(size(theta));
[x,y,z] = sph2cart(phi, theta, A); % fixed this line too
mesh(x,y,z)
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Vishwanath Iyer
2021-6-3
Consider the following function in Antenna Toolbox for plotting radiation patern data:
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