Polar charts with different series types

Each series in a polar chart can be given its individual series type. This enables us to combine different series types in a single polar chart.

Consider the following two series for the United States and China respectively, showing their fuel consumption by fuel type. The types are line and area respectively:

{
  name: 'U.S.',
  type: 'line',
  data: [819.9, 654, 437.4, 183.2, 63.2, 50.7]
}, {
  name: 'China',
  type: 'area',
  data: [483.7, 129.5, 1873.3, 22, 194.8, 31.9]
}

The chart now has three series with different series types. The polar chart produced after you introduce the preceding two series will be as follows: