Pie charts (the term first used by Haskell, 1922) are useful for representing proportions. Individual data values of the X variable are represented as the �wedges� of the pie. In STATISTICA, circular or elliptical, 2D or 3D pie charts can be made to display either frequency data (Counts) or data values of a single variable (Values). Frequency data can be calculated in intervals defined in several different ways as discussed in Methods of Categorization.

Labels on pie charts can be specified as values, percents, text labels, text labels and values, or text labels and percents (shown above).

3D Appearance. Note that for either style of pie chart, you can create a 3D appearance, using the options on the Pie Charts specification dialog. You can also create 3D appearance pie charts using the Graphs of Block Data - Custom Graph options.

See also, Graphs - Pie Charts and the Conceptual Overview foe Pie Charts.