title: how to create semi donut chart in E-Chart
body: <p>I want to make a "Half Doughnut" chart. It should be like first chart in the picture.</p>
  
  <p>But in my chart space occupies above the chart (Second chart). is it possible to remove that space.</p>
  
  <p>Image link: <a href="https://i.stack.imgur.com/xPOUU.png" rel="nofollow noreferrer">https://i.stack.imgur.com/xPOUU.png</a></p>
  
  <p><strong>My code :</strong>  </p>
  
  <pre><code>option = {
  
      legend: {
          orient: 'vertical',
          x: 'left',
          data: ['直接访问', '邮件营销', '联盟广告', '视频广告', '搜索引擎']
      },
      series: [
          {
              name: 'half semi',
              type: 'pie',
              radius: ['50%', '70%'],
              center: ['50%', '100%'],
              startAngle: 180,
              endAngle: 360,
              avoidLabelOverlap: false,
              label: {
                  normal: {
                      show: false,
                      position: 'center'
                  },
  
              },
              labelLine: {
                  normal: {
                      show: false
                  }
              },
              data: [
                  { value: 3, name: 'ok' },
                  { value: 5, name: 'bad' },
                  { value: 2, name: 'warning' },
                  { value: 10, name: 'bottom' }
              ]
          }
      ]
  };
  </code></pre>