Set LinearAxis, and formats the values to include a dollar sign and a thousands separator.
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<!-- charts/CustomLabelFunction.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
import mx.charts.*;
import mx.collections.ArrayCollection;
[Bindable]
public var expenses:ArrayCollection = new ArrayCollection([
{Month: "Jan", Income: 2000, Expenses: 1500},
{Month: "Feb", Income: 1000, Expenses: 200},
{Month: "Mar", Income: 1500, Expenses: 500}
]);
// This method customizes the values of the axis labels.
// This signature (with 4 arguments) is for a CategoryAxis.
public function defineLabel(cat:Object,pcat:Object,ax:CategoryAxis,labelItem:Object):String{
// Show contents of the labelItem:
for (var s:String in labelItem) {
trace(s + ":" + labelItem[s]);
}
// Return the customized categoryField value:
return cat + " '07";
// Note that if you did not specify a categoryField,
// cat would refer to the entire object and not the
// value of a single field. You could then access
// fields by using cat.field_name.
}
// For a NumericAxis, you do not use the labelItem argument.
// This example uses a NumberFormatter to add a thousands
// separator.
public function defineVerticalLabel(cat:Object,pcat:Object,ax:LinearAxis):String{
return "$" + numForm.format(cat);
}
</mx:Script>
<mx:NumberFormatter id="numForm" useThousandsSeparator="true" />
<mx:Panel>
<mx:ColumnChart id="column" dataProvider="{expenses}">
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="Month" title="Expenses"
labelFunction="defineLabel" />
</mx:horizontalAxis>
<mx:verticalAxis>
<mx:LinearAxis title="Income" minimum="0" maximum="2500"
labelFunction="defineVerticalLabel" />
</mx:verticalAxis>
<mx:series>
<mx:ColumnSeries xField="Month" yField="Income"
displayName="Income" />
<mx:ColumnSeries xField="Month" yField="Expenses"
displayName="Expenses" />
</mx:series>
</mx:ColumnChart>
</mx:Panel>
</mx:Application>
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