how to pass array values to dojo pie chart using javascript

Please can any one help me out how to pass array values to the dojo pie 开发者_如何学编程chart using javascript..

I need to update the pie chart on fly. on selection on user from gridivew..

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I can help with Pie chart:

my_chart.
  // let's update data
  updateSeries("your series name here", your_data_here).
  // finished updating, now let's show the changes
  render();

Adding a series with the same name will work too:

my_chart.
  // let's update data
  addSeries("your series name here", your_data_here).
  // finished updating, now let's show the changes
  render();