ColumnChart - Gráfico

Abaixo um exemplo de utilização do ColumnChart

ColumnChart.mxml

<?xml version="1.0"?>
<!-- Simple exemplo to demonstrate the ColumnChart and BarChart controls. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        <![CDATA[          
        import mx.collections.ArrayCollection;

        [Bindable]
        private var medalsAC:ArrayCollection = new ArrayCollection( [
            { Country: "USA", Gold: 35, Silver:39, Bronze: 29 },
            { Country: "China", Gold: 32, Silver:17, Bronze: 14 },
            { Country: "Russia", Gold: 27, Silver:27, Bronze: 38 } ]);
        ]]>
    </mx:Script>

    <!-- Define custom colors for use as fills. -->
    <mx:SolidColor id="sc1" color="yellow" alpha=".8"/>
    <mx:SolidColor id="sc2" color="0xCCCCCC" alpha=".6"/>
    <mx:SolidColor id="sc3" color="0xFFCC66" alpha=".6"/>

    <!-- Define custom Strokes for the columns. -->
    <mx:Stroke id="s1" color="yellow" weight="2"/>
    <mx:Stroke id="s2" color="0xCCCCCC" weight="2"/>
    <mx:Stroke id="s3" color="0xFFCC66" weight="2"/>

    <mx:Panel title="ColumnChart and BarChart Controls Example" 
        height="100%" width="100%" layout="horizontal">
        <mx:ColumnChart id="column" 
            height="100%" 
            width="45%" 
            paddingLeft="5" 
            paddingRight="5" 
            showDataTips="true" 
            dataProvider="{medalsAC}"
        >                
            <mx:horizontalAxis>
                <mx:CategoryAxis categoryField="Country"/>
            </mx:horizontalAxis>
                
            <mx:series>
                <mx:ColumnSeries 
                    xField="Country" 
                    yField="Gold" 
                    displayName="Gold"
                    fill="{sc1}"
                    stroke="{s1}"
                />
                <mx:ColumnSeries 
                    xField="Country" 
                    yField="Silver" 
                    displayName="Silver"
                    fill="{sc2}"
                    stroke="{s2}"
                />
                <mx:ColumnSeries 
                    xField="Country" 
                    yField="Bronze" 
                    displayName="Bronze"
                    fill="{sc3}"
                    stroke="{s3}"
                />
            </mx:series>
        </mx:ColumnChart>

        <mx:Legend dataProvider="{column}"/>

         <mx:BarChart id="bar" height="100%" width="45%" 
            paddingLeft="5" paddingRight="5" 
            showDataTips="true" dataProvider="{medalsAC}">
                
            <mx:verticalAxis>
                <mx:CategoryAxis categoryField="Country"/>
            </mx:verticalAxis>
                
            <mx:series>
                <mx:BarSeries 
                    yField="Country" 
                    xField="Gold" 
                    displayName="Gold"
                    fill="{sc1}"
                    stroke="{s1}"
                />
                <mx:BarSeries 
                    yField="Country" 
                    xField="Silver" 
                    displayName="Silver"
                    fill="{sc2}"
                    stroke="{s2}"
                />
                <mx:BarSeries 
                    yField="Country" 
                    xField="Bronze" 
                    displayName="Bronze"
                    fill="{sc3}"
                    stroke="{s3}"
                />
            </mx:series>
        </mx:BarChart>

        <mx:Legend dataProvider="{bar}"/>

    </mx:Panel>
</mx:Application>

Fonte : http://livedocs.adobe.com/flex/3/langref/mx/charts/ColumnChart.html