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If you want to create a doughnut chart, create the <Pie2DChart> element tag with setting the value of the innerRadius attribute. The innerRadius attribute determines the radius of the hole which is located at the center of the pie chart.

...
<Pie2DChart innerRadius="0.3" showDataTips="true" >
...					
  <Pie2DSeries nameField="Country" field="Export" startAngle="-120" renderDirection="clockwise" labelPosition="inside" color="#ffffff">
  ...
  </Pie2DSeries>
...
</Pie2DChart>
...

<Pie2DChart>

innerRadius The innerRadius attribute determines the radius of the hole which is located at the center of the pie chart. The value is the percentage of the radius of the outer circle. The valid range is "0" ~ "1" and the default value is "0".

<Pie2DSeries>

renderDirection The renderDirection attribute determines the rendering direction of the pie chart. The valid values are "clockwise", "counterClickwise", and the default value is "counterClockwise".

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