3D Cylindical Coordinates plot

2020 6 1
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更新时间：2020 6 1
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How can i 3D plot a function in matlab, in cylindrical coordinates?
my function : Z = ln(r) + 4*theta
i tried converting to cartesian coordinates, then plotting but at some points function jumps up or down (i think due to trigonometric functions) , so i wanted to see it in cylindrical coordinates. That supposed to be superposition of a vortex and source. Thanks for your time.

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KSSV
KSSV 2020-6-1
Show us the code you tried.
[X,Y] = meshgrid(-5:.25:5);
Z = 2.*log((X.^2+Y.^2).^0.5)+4.*atan(Y./X);
surf(X,Y,Z)
but i want to do this in 3D cylindrical coordinates if possible
Thanks fot the answer but i want to plot my function in cylindrical coordinates without changing it into cartesian one (and returning back to cylindrical);
Z = ln(r) + 4*theta
i want to plot that one. (Not the cartesian one )
maybe a 3D version of polarplot?
KSSV
KSSV 2020-6-1
The link I gave you convers the cartesian coordinates into cylindrical coordinates.

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