MATLAB: Please help with polar plot

MATLABpolar plot

Hi guys I am doing PhD study on obseving the flow velocities in pipe flow partailly filled. I sketched a figure1 showing a pipe with dimeter 60 cm and flow depth is 15 cm, the red points showing where the velocities in x direction are measured '' you can assume any values''. I need to plot that into contour style in Matlab.. just like the figure2 shown below. thank you figure1 http://i49.tinypic.com/3150568.jpg
figure2 http://i49.tinypic.com/2notb5.jpg

Best Answer

Instead of treating it as a polar plot, treat it as a rectangular coordinate plot, assigning NaN to the z coordinate for each point where there should not be any data. Then contourf().
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