Perform the following steps to create a calculated field:
- Select the Data tab in the Interactive Report in which you want to add a calculated field.
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Navigate to the bottom of the Data tab, locate the Calculated Fields entry.
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Click the plus sign on the Calculated Fields.
The Create Calculated Field dialog box appears.
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Enter the values as for your calculated field as described in the following table:
Field Description Display Name Enter the name of the calculated field you want displayed. Category Select the category of the function. Select Fields Select the fields to use in the formula. Functions Select the formula function to apply in the calculated field by double-clicking the function name. The function will appear in the Formula field. See the Pentaho Report Designer document for common formula functions. Formula Edit your formula field to your specifications. Data Format Select the data type for the calculated field you have created. The values are:
- Numeric
- Date
- Other
Description Displays the description of the selected function Return Type Displays the return type of the selected function. For example, SUM(2, 3) will return an integer type, while CONCATENATE("A", "B") will return a string type.
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Click OK
The calculated field is added to the list in the Data tab.
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(Optional) Right-click the calculated field to open a menu with the following options:
- Edit: Select to edit the calculated field formula.
- Delete: Select to delete the calculated field.
- Add To Report: Select to add the calculated field to the columns in the report layout.
- Add To Groups: Select to add the calculated field to the groups in the report layout.