plot 3D cylindrical coordinates

Hi everybody!

I am trying to do something as simple as plotting z=z(r,theta). I just don't get. Neither the help file nor techsupport have been of much use. What am I missing? Why is it that you have no axis annotation like you do in case of cartesian coordinates?!

thanks in advance

dimitrios

axis annotation?

May be you mean cylindrical coordinate lines, something that can be approached this way:

with(plots):with(plottools):
P:=changecoords(plot3d(r^2,r=0..1,phi=0..2*Pi,axes=normal),cylindrical):
C:=coordplot(polar,labelling =true,scaling=constrained):
f := transform((x, y) -> [x, y, 0]):
display({P, f(C)}, orientation=[46, 52]);

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