how to merge cells in reports if its have same Catogory value ??

[rajasekhar_1]

I am new to jasper ,

I want to know how to group if same value in rows ,those rows in perticular column should merge (Catogory), I would like to design as following plz help me how to do in eclipse step by step

Thanks,

Rajasekhar

 

Catogory	Data	Value
Cat A	data 1	11
	data 2	13
	data6	41
Cat B	data 3	17
	data 4	19