My requirement is different. As in Pega 6 using trend report (Expression), different condition has been used to get the count(Aggregate Functions). Data is displayed in columns itself not in the chart. e.g, We are displaying count of pyid (Work object) based on its Prefix assigned to a particular operator ID. It is stored in same table columns.
Above has been done in trend report of Summary views. I am looking to configure same in PEGA 7 using Report Definitions. Attaching Screenshots(Pega 6) for reference.