echarts 虚线分割线

在Echarts中，可以通过设置yAxis的splitLine属性来实现虚线分割线。可以设置splitLine的lineStyle的type为'dashed'来指定分割线为虚线样式。例如：

option = {
  yAxis: {
    splitLine: {
      lineStyle: {
        type: 'dashed'
      }
    }
  },
  // 其他配置项...
};

这样，y轴的分割线就会以虚线的形式显示出来。<span class="em">1</span><span class="em">2</span>
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