Making a donut plot in IGOR

This looks like three pie charts stacked up? The outer ring in back, then the inner ring, finally the circle in the middle? Possibly you could use Igor's pie chart package (Windows->New->Packages->2D Pie Chart) to make the individual pie charts, then composite them in a page layout.

You may also want to check out File Menu->Example Experiments->Visualization->wedges for a 3D version.

I've made some changes recently to the 2D Pie chart procedures (attached) that might help.

These procedures are scheduled to ship with Igor 8.04, but should work on Igor 6.37, too.

Replace the same-named files in your WaveMetrics Procedures/Graphing and /Windows folders.