[flexcoders] Unique values on the CategoryAxis

[Vijay Anand Mareddy]

How do i make the CategoryAxis show only unique values

In my example, I dont want the Apple to apear twice on the vertical 
axis.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; 
layout="absolute">
        <mx:Script>
        <![CDATA[       
        import mx.controls.Alert;
        import mx.collections.ArrayCollection;
        import com.adobe.utils.ArrayUtil;
        
        [Bindable]
        public var someData:ArrayCollection = new ArrayCollection([
        {editedEndDate:"01/01/2006", mpid:"GRAPES", modelId:1},
        {editedEndDate:"05/01/2007", mpid:"APPLE", 
modelId:23},        
        {editedEndDate:"11/01/2009", mpid:"APPLE", modelId:160},
        {editedEndDate:"05/01/2008", mpid:"ORANGE", 
modelId:4},        
        {editedEndDate:"05/01/2009", mpid:"MANGO", modelId:5}
    ]);     
    
        [Bindable]
    public var uniqueArr:Array = ["GRAPES","APPLE","ORANGE","MANGO"];
     
     private function uniqueMPIDFunc(axis:CategoryAxis, 
item:Object):Object {
        if(ArrayUtil.arrayContainsValue(ArrayCollection
(axis.dataProvider).toArray(),item.mpid)){
                Alert.show("exist:"+item.mpid+":");
                return new Object();
        } else {
                  Alert.show("new:"+item.mpid+":");
          return item.mpid;     
        }
        
        }

     
        ]]>
</mx:Script>

<mx:Panel title="DateTimeAxis" width="100%" height="100%"> 
        <mx:PlotChart id="mychart" dataProvider="{someData}" 
showDataTips="true"> 
                <mx:horizontalAxis> 
                        <mx:DateTimeAxis dataUnits="days" />
                </mx:horizontalAxis>
                <mx:verticalAxis>
                        <mx:CategoryAxis  
dataFunction="uniqueMPIDFunc"/>
                </mx:verticalAxis>
                <mx:series>
                        <mx:PlotSeries yField="mpid" 
xField="editedEndDate" displayName="myData"/> 
                </mx:series>  
        </mx:PlotChart>  
</mx:Panel> 

</mx:Application>