<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/10/15/using-data-effects-to-animate-chart-data/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

<mx:Script>
        <![CDATA[
            private function updateDP():void {
                var str:String = categoryFieldComboBox.selectedItem.data;
                barSeries.xField = str;
                barSeries.displayName = str;
            }
        ]]>
    </mx:Script>

<mx:SeriesInterpolate id="seriesInterpolate" duration="1000" />
    <mx:SeriesSlide id="seriesSlide" duration="1000" direction="right" />
    <mx:SeriesZoom id="seriesZoom" duration="1000" />

<mx:Array id="dataEffects">
        <mx:Object label="seriesInterpolate" data="{seriesInterpolate}" />
        <mx:Object label="seriesSlide" data="{seriesSlide}" />
        <mx:Object label="seriesZoom" data="{seriesZoom}" />
    </mx:Array>

<mx:Array id="categoryFields">
        <mx:Object data="obp" label="OBP" />
        <mx:Object data="slg" label="SLG" />
        <mx:Object data="avg" label="AVG" />
    </mx:Array>

<mx:ArrayCollection id="arrColl">
        <mx:source>
            <mx:Array>
                <mx:Object name="R Winn" obp=".353" slg=".445" avg=".300" />
                <mx:Object name="P Feliz" obp=".290" slg=".418" avg=".253" />
                <mx:Object name="O Vizquel" obp=".305" slg=".316" avg=".246" />
                <mx:Object name="B Molina" obp=".298" slg=".433" avg=".276" />
                <mx:Object name="R Durham" obp=".295" slg=".343" avg=".218" />
            </mx:Array>
        </mx:source>
    </mx:ArrayCollection>

<mx:ApplicationControlBar dock="true">
        <mx:Form>
            <mx:FormItem label="categoryField:">
                <mx:ComboBox id="categoryFieldComboBox"
                    dataProvider="{categoryFields}"
                        change="updateDP();" />
            </mx:FormItem>
            <mx:FormItem label="showDataEffect:">
                <mx:ComboBox id="showDataEffectComboBox"
                        dataProvider="{dataEffects}"
                        change="updateDP();" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>

<mx:BarChart id="barChart"
             showDataTips="true"
             dataProvider="{arrColl}"
             width="100%"
             height="100%">
        <mx:verticalAxis>
            <mx:CategoryAxis categoryField="name"/>
        </mx:verticalAxis>
        <mx:series>
            <mx:BarSeries id="barSeries"
                    yField="name"
                    xField="obp"
                    displayName="obp"
                    showDataEffect="{showDataEffectComboBox.selectedItem.data}" />
        </mx:series>
    </mx:BarChart>

</mx:Application>