call a function that does the filtering either on the creation complete, or if you are retreiving data, as the last thing in your resultHandler for the returned data.
I was trying that for the resultHandler but that just gives me an error: 1009 cannot access property or method of a null object ref.
I was adding myChart.refresh() to the resultHandler. When I take it out there are no errors.
Sounds like something the filter function uses is null when the results are first returned?
private var _filterInvalid:Boolean = false;
override protected function commitProperties():void
_filterInvalid = false;
Also, you might also want to have your filter function check that things are not null before using their sub properties.