Creating Calculated Fields

The Dashboard Designer provides the capability to create calculated fields that allow you to apply complex expressions to data fields that are obtained from the dashboard's data source. You can use these fields in data visualizations as regular data source fields.

Creating a Calculated Field

After you have created a data source, you can add a new calculated field based on the existing data source fields.

To create a calculated field, select the required data source (and the required DAS report/data member, if applicable) in the Data Source Browser and click the Add Calculated Field button in the Ribbon's Data Source tab...

...or right-click the Field List and select Add Calculated Field in the context menu.

This invokes the Expression Editor dialog, which allows you to specify an expression that will be used to obtain calculated field values. Here, you can construct the required expression.

You can use the following elements in expressions.

• Functions

  Note

  To learn how to use Aggregate functions, see Aggregations. The Expression Operators, Functions and Constants topic lists the functions (DateTime, Math, String, etc.) supported by expressions.

• Operators

• Columns
• Constants
• Parameters

After the expression has been specified, click OK. This displays a new calculated field in the data source structure.

Now you can specify the required calculated field type, change its default name, etc.

Editing a Calculated Field

To edit a calculated field, use its context menu.

This menu contains the following items.

Item	Description
Edit Expression...	Invokes the Expression Editor dialog, which allows you to change an expression for an existing calculated field.
Field Type	Specifies the type of the calculated field.
Rename	Changes the calculated field name.
Delete	Removes the existing calculated field from the data source.