I have an Add-In for Excel that makes sending data from your worksheet
to my graphing program (DPlot) a snap. DPlot will produce a polar plot
with angular values in either degrees or radians. The Add-In works with
either the full version ($35/user) or the scaled-down, free DPlot Jr.
The Add-In is distributed with both versions.

If you want the plot shown in Excel you can copy it to the clipboard in
DPlot and paste either a metafile or bitmap back into your worksheet.

David Hyde
http://www.dplot.com