Now in the Editing window, select the Series tab (the top one - there are two of them), then in the Series dialog box select Data Source, then Function from the drop down list box. Then from the Function drop down list box select Copy and from the Available list box, select Series0 and move it across into the Selected list box with the '>' button. This will make the data that's been set for Series0 in the program available for the new Pie series, Series 1. Click the Close button and you'll see a Pie chart of the mathematical function superimposed on the original flat, 2D graph.