How to group category series data

In the chartbuilder, on Select Data, choose Edit Group and Sorting. Figure 15-3 shows the location of Edit Group and Sorting. In Grouping, select Enabled to see the grouping options shown in Figure 15-4.

In Type, select Text, Numeric, or Date and Time. If you select Date and Time, you can specify the units to use to form the groups, such as Minutes.

In Interval, select a number that represents the size of the groups to create. For example, to group three-row sequences of text data, select 3. To group numeric data in sections of four, select 4.

In Aggregate Expression, select the function to use to aggregate the data in the group. You can select Average or Sum.