在百度echarts中添加標識線markLine

在百度echarts中添加標識線，打開如下網址複製代碼到輸入框，繪製一條直線。

http://echarts.baidu.com/echarts2/doc/example/line3.html

option = {
    title : {
        text: '某樓盤銷售狀況',
        subtext: '純屬虛構'
    },
    tooltip : {
        trigger: 'axis'
    },
    legend: {
        data:['意向','預購','成交']
    },
    toolbox: {
        show : true,
        feature : {
            mark : {show: true},
            dataView : {show: true, readOnly: false},
            magicType : {show: true, type: ['line', 'bar', 'stack', 'tiled']},
            restore : {show: true},
            saveAsImage : {show: true}
        }
    },
    calculable : true,
    xAxis : [
        {
            type : 'category',
            boundaryGap : false,
            data : ['週一','週二','週三','週四','週五','週六','週日']
        }
    ],
    yAxis : [
        {
            type : 'value'
        }
    ],
    series : [
        {
            name:'成交',
            type:'line',
            smooth:true,
            itemStyle: {normal: {areaStyle: {type: 'default'}}},
            data:[10, 12, 21, 54, 260, 830, 710],
          markLine:{
            itemStyle:{
            normal:{lineStyle:{type:'solid',color:'#000'},label:{show:true,position:'left'}}
            },
            large:true,
            effect:{
              show: false,
    loop: true,
    period: 0,
    scaleSize : 2,
    color : null,
    shadowColor : null,
    shadowBlur : null
          },
              data:[
                 [
        {name: '標線1起點', value: 400, xAxis: -1, yAxis: 400},      // 當xAxis爲類目軸時，數值1會被理解爲類目軸的index，經過xAxis:-1|MAXNUMBER可讓線到達grid邊緣
        {name: '標線1終點', xAxis: '週日', yAxis: 400},             // 當xAxis爲類目軸時，字符串'週三'會被理解爲與類目軸的文本進行匹配
    ],
            ]
          }
          
          
          
        },
        {
            name:'預購',
            type:'line',
            smooth:true,
            itemStyle: {normal: {areaStyle: {type: 'default'}}},
            data:[30, 182, 434, 791, 390, 30, 10]
        },
        {
            name:'意向',
            type:'line',
            smooth:true,
            itemStyle: {normal: {areaStyle: {type: 'default'}}},
            data:[1320, 1132, 601, 234, 120, 90, 20]
        }
    ]
};