### 修改雷达图点形状

:::demo

```javascript
const data = [
  { label: '分类一', category: '类别一', value: 19 },
  { label: '分类二', category: '类别一', value: 74 },
  { label: '分类三', category: '类别一', value: 40 },
  { label: '分类四', category: '类别一', value: 46 },
  { label: '分类五', category: '类别一', value: 30 },
  { label: '分类六', category: '类别一', value: 62 },

  { label: '分类一', category: '类别二', value: 69 },
  { label: '分类二', category: '类别二', value: 14 },
  { label: '分类三', category: '类别二', value: 70 },
  { label: '分类四', category: '类别二', value: 26 },
  { label: '分类五', category: '类别二', value: 50 },
  { label: '分类六', category: '类别二', value: 52 }
]

const { Chart, Radar, Tooltip, Legend } = qcharts

const chart = new Chart({
  container: '#app'
})
chart.source(data, {
  row: 'category',
  value: 'value',
  text: 'label'
})

const radar = new Radar()

radar.style('point', (d, data, i) => {
  if (data.category === '类别一') {
    return { pointType: 'rect' }
  }
})

const legend = new Legend({ align: ['center', 'bottom'] })
chart.append([radar, legend])
```

:::