3D Cylindical Coordinates plot

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.

[KSSV]

Show us the code you tried.

[Deniz Ilayda Bilgen]

[X,Y] = meshgrid(-5:.25:5);

Z = 2.*log((X.^2+Y.^2).^0.5)+4.*atan(Y./X);

surf(X,Y,Z)

[Deniz Ilayda Bilgen]

but i want to do this in 3D cylindrical coordinates if possible

[KSSV]

Try using this: https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/e564dff6-4a80-11e4-9553-005056977bd0/94a39e0c-fb32-4016-8ef7-1c72826dec27/previews/geom3d/geom3d/cart2cyl.m/index.html

[Deniz Ilayda Bilgen]

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]

The link I gave you convers the cartesian coordinates into cylindrical coordinates.