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3D plor plot

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Mario on 20 Apr 2016
Answered: Mike Garrity on 20 Apr 2016
Is there a way to plot data in a cylindrical scatter plot? I have a (70000x3) matrix of angles, radius and a third variable that I would like to plot in the same graph.
Much like the polar plot plus an additional z-direction. I have seen "3D Polar Plot" etc, but they only provide mesh or contour plots and I would like to plot the individual points. Basically a scatter3 but in cylinder coordinates.

Accepted Answer

Mike Garrity
Mike Garrity on 20 Apr 2016
The pol2cart function will convert this to 3D Cartesian, so it's easy to get the scatter plot:
npts = 70000;
th = 2*pi*rand(npts,1);
r = 5+rand(npts,1)/3;
v = randn(npts,1);
[x,y,z] = pol2cart(th,r,v);
c = v;
axis equal
You don't get a polar grid with this approach though. If you need that, I think that there are some options on the File Exchange .

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