// X坐标轴
const xValue = ['6','6.5','7','7.5','8','8.5','9','9.5','10'];
//Y坐标轴
const yValue = ['1.5','2','2.5','3','3.5','4','4.5','5','5.5','6'];
// 需要展示的值【X坐标,Y坐标,展示的数值】
const data = [[6.5,2,4], [7, 2.5, 10]] ;
// 坐标轴及数值存在小数时，需要进行转化，否则当数据过多时会出现覆盖问题
const  z = data.map(function (item) {
    const xAx = ['6','6.5','7','7.5','8','8.5','9','9.5','10'];
    const yAx = ['1.5','2','2.5','3','3.5','4','4.5','5','5.5','6'];
    const xValue = item[0].toString();
    const yValue = item[1].toString();
    const xIndex = xAx.indexOf(xValue);
    const yIndex = yAx.indexOf(yValue);
    return [xIndex, yIndex, item[2] || '-'];
  });
option = {
  tooltip: {
    position: 'top'//tip展示的位置
  },
  grid: {
    height: '50%',//echarts高度
    top: '10%',//距离顶部的距离
  },
  xAxis: {
    type: 'category',
    data: xValue,
    splitArea: {
      show: true//斑马纹展示
    }
  },
  yAxis: {
    type: 'category',
    data: yValue,
    splitArea: {
      show: true//斑马纹展示
    }
  },
  visualMap: {
    min: 0,//最小值
    max: 50,//最大值
    calculable: true,//是否显示数值范围
    orient: 'horizontal',
    left: 'center',
    bottom: '15%'
  },
  series: [
    {
      name: 'Punch Card',
      type: 'heatmap',
      data: z,
      label: {
        show: true//是否在图上显示数值
      },
      emphasis: {
        itemStyle: {
          shadowBlur: 10,
          shadowColor: 'rgba(0, 0, 0, 0.5)'
        }
      }
    }
  ]
};