Hello,
I am using PieChart plugin in my app. The app has a combo with some item and when the user select an item a database query is executed and gives result back. The problem is that when you select a combo item for the second time the first piechart elements should be deleted, but I don't know how to do this, because the elements are generated dynamically from the query.

Could someone tell me who can I delete all piechat elements without knowing their names?!