title: echart line charts - how to remove series line markers
body: <p>Plotting a series line with Baidu's echarts library, does anyone here know how to remove the x-axis tick marker (the small circles on the line - see screenshot below)?</p>
  
  <p><a href="https://i.stack.imgur.com/1KTkC.png" rel="nofollow noreferrer">screenshot (unable to embed)</a></p>
  
  <p>I can't find an option in the series line type <a href="https://ecomfe.github.io/echarts-doc/public/en/option.html#series-line.type" rel="nofollow noreferrer">https://ecomfe.github.io/echarts-doc/public/en/option.html#series-line.type</a></p>
  
  <p>edit: here's a simple <a href="https://jsfiddle.net/touring/3L4g5qkh/" rel="nofollow noreferrer">example on jsfiddle</a></p>
  
  <pre><code>var myChart = echarts.init(document.getElementById('container'));
  
  myChart.setOption(option = {
  xAxis: {
      type: 'category',
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
      type: 'value'
  },
  series: [{
      data: [820, 932, 901, 934, 1290, 1330, 1320],
      type: 'line'
  }]
  });
  
  window.onresize = function() {
  myChart.resize();
  };
  </code></pre>
  
  <p>Thanks</p>