Plotting Data in a 3D polar plot

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Ben Bladow
Ben Bladow 2018-6-26
评论： Anton Semechko 2018-6-27
I would like to plot the attached data (regarding antenna gain for different frequencies) as a 3D polar plot and I was hoping to find some function that takes theta, phi, and a radius as input (like the built in polarplot MATLAB function). I have looked Ken Garrad's and J De Freitas' 3D polar plotting functions but I don't know how to get my data formatted so that I can use their functions. I am relatively new to MATLAB so any help is much appreciated. I tried converting to Cartesian corrdinates and then plotting the data, but it does not display the data as clearly as I want.
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Ben Bladow
Ben Bladow 2018-6-26
编辑：Ben Bladow 2018-6-27
1) Those are the different frequencies tested for gain, i.e. 820 MHz.
2) Same radial distance and same spatial directions (I believe... if I understand your question correctly).
Anton Semechko
Anton Semechko 2018-6-27
Ok. So let's take the "data block" in 'data.xls' for 820 Hz, what are the Cartesian coordinates of the samples in cells C3 to C39? Please post the code used to obtain the answer on here.

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KSSV
KSSV 2018-6-26
[num,txt,raw] = xlsread('data.xls') ;
th = num(1,3:end) ;
phi = num(3:39,3:end) ;
th = repmat(th,size(phi,1),1) ;
u = sin(th).*cos(phi) ;
v = sin(th).*sin(phi) ;
quiver(u,v)
https://in.mathworks.com/help/phased/ug/spherical-coordinates.html
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Ben Bladow
Ben Bladow 2018-6-26
Hey, thanks for the response. I tried out your code and I don't think a quiver graph helps make the data more visually readable. Of course it might just be because I don't know how to read one...

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