flex - How can I use filterFunction in ColumnSeries -


i have set of data following:

        [bindable]     public var loc:arraycollection = new arraycollection([         {date:"2002", close:41.87, loc: "location 01"},         {date:"2003", close:45.74, loc: "location 01"},         {date:"2004", close:42.77, loc: "location 01"},         {date:"2005", close:48.06, loc: "location 01"},         {date:"2006", close:48.06, loc: "location 01"},         {date:"2002", close:157.59, loc: "location 02"},         {date:"2003", close:160.3, loc: "location 02"},         {date:"2004", close:150.71, loc: "location 02"},         {date:"2005", close:156.88, loc: "location 02"},     ]);

and i'd create chart following, in each location displayed in different color , grouped each year: enter image description here

i thinking must use "mx:columnseries" tag , use "filterfunction" property define how filter data each location separate series, don't know how that. anyboy have recommendation or sample code creating such charts? thank you

here example:

private function filterseries1(cache:array):array {     var filteredcache:array = [];     (var i:int = 0; < cache.length; i++)     {         var item:columnseriesitem = columnseriesitem(cache[i]);         if(item.item.loc == "location 01")             filteredcache.push(item);     }     return filteredcache; }  private function filterseries2(cache:array):array {     var filteredcache:array = [];     (var i:int = 0; < cache.length; i++)     {         var item:columnseriesitem = columnseriesitem(cache[i]);         if(item.item.loc == "location 02")             filteredcache.push(item);     }     return filteredcache; }

and:

<mx:series>     <mx:columnseries yfield="close" xfield="date"                      labelposition="outside"                      filterfunction="{filterseries1}"/>     <mx:columnseries yfield="close" xfield="date"                      labelposition="outside"                      filterfunction="{filterseries2}"/> </mx:series>

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