The customizations that can be applied to the charts in Flex are nearly limitless. Among the myriad of customizations you can make include the ability to have data animate into the chart or to apply colors, gradients, and so on to the elements of a chart.
There are three types of built-in animations that can be easily applied to charts. They are all built as subclasses of the mx.charts.effects.SeriesEffect class. These classes can be used with a series showDataEffect or hideDataEffect attribute. The classes are the following: