How to rotate a 2d line a 3d plot

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Pruthvi Acharya
Pruthvi Acharya 2019-1-25
So I have a 2d line in the xz plane, whose function I don't know, I want to rotate that line about the z axis. For example, if i have a straight line in the xz plane and i rotate it about the z axis I will get a cone.
I know I am suppose to use the rotation matrix;
R_z = (cos(theta),-sin(theta),0;sin(theta),cos(theta),0;0,0,1);
but my issuse is how do I display that rotated line as a surface plot.
Or would it be easier to transfer the 2d line into spherical coordinates, but I don't know how to plot spherical coordinates in Matlab.
Thanks

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