let data = []

for (let i = 0; i <= 360; i++) {
  let t = i / 180 * Math.PI
  let r = Math.sin(2 * t) * Math.cos(2 * t)
  data.push([r, i])
}

export default {
  title: {
    text: '极坐标双数值轴'
  },
  legend: {
    data: ['line']
  },
  polar: {
    center: ['50%', '54%']
  },
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'cross'
    }
  },
  angleAxis: {
    type: 'value',
    startAngle: 0
  },
  radiusAxis: {
    min: 0
  },
  series: [
    {
      coordinateSystem: 'polar',
      name: 'line',
      type: 'line',
      showSymbol: false,
      data: data
    }
  ],
  animationDuration: 2000
}