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Re: Plotting a contour plot with cylindrical co-ordinates


If z=f(r,theta) is given, convert (r,theta) -> (x,y).  For example:
z[r_,theta_]= Sec[r*3]*(2*theta-1); x= r*Cos[theta];y=r*Sin[theta] 
ParametricPlot3D [{x,y,z[r,theta]},{r,1,6},{theta,0,6},
PlotPoints->{15,21}]

On 20 Jul 04 14:45:29 -0400 (EDT), Jake wrote:
>I have a set of data which corresponds to points on a circle. I have
>these values as a function of r and theta. Is there a way of plotting
>this in Mathematica? The ContourPlot function requires x and y
>co-ordinates.
>Please help if you know.
>thanks.


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