Contour plotting with origin or matlab
 

Can somebody who has ideas on how to use ORIGIN to plot lines of constant property help me. I have problem using ORIGIN to plot such lines for cylindrical coordinates. The output of my fields is in x, y, z, where z is the property I want to plot. x and y are the cartesian coordiates obtained from the r, and theta cordinates.

Anyone that also has idea on how I can use MATLAB to do the same thing as above to kindly guide me.

Thanks for your assistance.

M. A. Waheed, Ogbomoso, Nigeria