Pie Graphs

Pie graphs can be used for:

Comparing data elements against the sum of the elements
Budgets
Money distribution

The Pie graph is another commonly used graph type. Pie graphs are most often used to show data as a percentage of the whole. Pie graphs represent an entire data category as a pie (all other data is thrown out). Each data item in that category is shown as a pie wedge. The wedge size will be proportional to that data item's percentage of the sum of all data items in the category.

Though this may sound complex, Pie graphs are actually quite intuitive. Example 13.6 shows exactly how they work.

Pie graphs are in the Standard Data Class (see Chapter 12 for details). To create a Pie graph with PopChart XML, create a Graph element and set its Type attribute to Pie, as shown in the example below.