vf_chartlabel

<apex:page controller="vfc_apexbarSeries" showHeader="false" readOnly="true">
    <apex:chart width="600" height="275" data="{!data}">
        <apex:axis type="Numeric" position="right" fields="monthlyRevenue" title="Revenue (US$)">
            <apex:chartLabel rotate="60"/>
        </apex:axis>
        <apex:axis type="Category" position="bottom" fields="theMonth" title="2011"> 
        </apex:axis>
        <apex:barSeries title="Monthly Sales" orientation="vertical" axis="right" xField="theMonth" yField="monthlyRevenue"/>
    </apex:chart>
</apex:page>