Suppress in iReport

i would like to elimate group based 开发者_开发技巧on expression. how can i do it?

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Change the PrintWhenExpression value for the group band:

1. Click the group band in the Report Inspector pane.
2. Select Print When Expression in the Column Header - Properties pane.
3. Click the ... button.
4. Type in an expression that returns false when the group should not be displayed.