Suppress in iReport

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

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.