Performance graph

Guru's

I need to develop a graph which shows the CPU, memory and swap space utilization in a single graph against time

I know of NMON but I am not able to make a single graph out of it.

Does anyone know of any script or tool for data sampling and developing graph?

Thanks in advance

Bala

I believe IBM has an offering called ITM 6.1 Systems Edition that is free.
http://www.ibmsystemsmag.com/aix/aprilmay07/productnews/11796p1.aspx
Not sure if that was still available.

SORRY... just found this
http://www-01.ibm.com/software/tivoli/products/monitor-systemp/