The Pie chart can be used to visualize and compare similar values from many objects.
The example below shows the time in state for several objects.
There are two possible formats for the data table for the pie chart. The are described
in the following sections.
One Pie per Row
This is the simpler format.
The Pie chart assumes that each row in the table represents a single pie chart.
You can specify which columns to draw pie segments for. In addition, you can
specify which column to use for the title, and which column to display in the center.
Here is an example table:
With this data format and table, you can specify the following settings:
With those settings, the resulting chart would be similar to the following:
One Segment per Row
This format is more flexible. In this format,
the Pie chart assumes that each row represents a single segment in the pie.
You can specify which column determines the segment size, which column determines
the color, and which column(s) determine how the segments are grouped.
Here is an example table:
With this data format and table, you can specify the following settings:
With those settings, the resulting chart would be similar to the following:
You could alternatively use the following settings,
where the Segment Color and Split By options are switched:
This switch in settings creates a chart like the following:
The Data Tab
The data tab has the following properties:
Data Source - Choose a valid data source from the drop
down list. All Statistics Collectors and Calculated Tables are shown. You can also choose
the last option to create a new Statistics Collector. You can click the accompanying
button to open the properties window for the selected data source.
Data Format - Choose a data format. For more information
on data formats, see the Overview and Key Concepts section.
If the Data Format property is set to One pie per row, then the data tab has these additional
properties:
Pie Title - Choose a column from the data source
that contains the values you want to use as the title of each row. If you select the first
option, for None, then no text will be displayed above the pie.
Center Data - Choose a column from the data source
that contains the values you want to show in the center of each pie. If you select the first
option, for None, then no text will be displayed in the center of each pie.
Include - Choose which columns will be included in the pie
chart. The segment size is calculated relative to the selected
columns only. Each included column must not contain text.
If the Data Format property is set to One segment per row, then the Data Tab has these
additional properties:
Segment Size - Choose a column that determines
the size of the pie segment. This column should contain number data.
Segment Color - Optional. Choose a column that
determines the color of the segment.
Center Data - Optional. Choose a column
that displays data in the center of the pie. If there are multiple rows
for the same pie, then the last value for that pie will be used.
Split By - Optional. For each Split By column
specified, the pie chart will make one pie per unique combination of values
in those columns.
The Settings Tab
The settings tab has the following properties:
Show Legend - Check this box to show the legend.
Clear the box to hide the legend.
Show Percentages - Check this box to show the pie chart
in percentage mode, rather than by raw value. This only changes the center text. If this
box is cleared, then the center text will switch to raw value mode
Show Zero Columns - Check this box to display legend items
for all columns. Clear this box to show only columns where at least one row has data,
which implies only showing legend items for visible colors.
Segment Ordering - Select how segments in the pie
are ordered. The available options are:
Biggest segment first - The pie chart will order the segments by size.
Use order in table - The pie chart will order the segments as they
are orderd in the table.
Pie Sizing - Choose how the pie will be sized.
The available options are:
Automatic - The size of each pie will be determined by the length of the center text, if any.
Fixed values - The chart will use the specified values.
Outer Radius - If the Pie Sizing property is set to Fixed values,
then this value specifies the distance from the center of the pie to the outermost part of the pie.
Thickness - If the Pie Sizing property is set to Fixed values,
then this value specifies the distance from the outermost part of the pie to the innermost part of the pie.
To fill the pie all the way to the center, make this value the same as the Outer Radius property.
The Text Tab
The text tab has the following properties:
Precision - Specify the number of decimals to use
on the chart.
Font Size - Set the font size for general text on this chart in pixels.
Title Font Size - Set the font size for the chart title.
Custom Title - If checked, the chart will show this property's value
as the chart title. You can use this property to specify a title with special characters,
or to specify that no title should be shown.
Show Column Headers - This list allows you to specify which values,
if that value is written as text on the chart, should include the column header for that value.
For example, if you have a Type column, you might want the chart to show "Type: " before any
type values are written.
The Colors Tab
For all charts that use colors, the Colors tab allows you to choose which Color Palette
the chart uses. In addition, you can configure the colors and values for that palette.
For more information on Color Palettes, see the
Color Palette topic.
Performance Measures
The Pie Chart provides performance measures in the same way as
the Bar Chart. For more information, see the
Bar Chart
Performance Measures section.