isosurface in cylindrical coordinates

Hi.

How can I plot a 3D surface of the function F(r, theta,z) with 'isosurface'? The cylindrical coordinates are r, theta and z (r is the radius, theta is the angle and z is the axial coordinate)?

A million thanks for your help

Answer 1

[darova]

Use isosurface normally

[f,v] = isosurface(R,THETA,Z,F,isovalue);   % returns faces and vertices

Convert cylindrical coordinates into cartesian

x = v(:,1).*cos(v(:,2));
y = v(:,1).*sin(v(:,2));
z = v(:,3);

Use patch to plot

patch('Faces',f,'Vertices',[x y z])

[Marcel Lacroix]

It works. Many many thanks for your help.