[GitHub] [incubator-echarts] wangcongyi opened issue #9008: 动态渲染数据，之前的对比数据仍在

[GitHub]

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### One-line summary [问题简述]
1、选择单天日期 没有问题
![image](https://user-images.githubusercontent.com/13843979/45023069-44134100-b068-11e8-96d2-703cbc8286d7.png)
2、动态选择 对比日期 没有问题
![image](https://user-images.githubusercontent.com/13843979/45023089-58573e00-b068-11e8-8aa3-19c78462a164.png)
3、把对比日期给删除掉，并选择单天日期，对比日期的图形扔在
![image](https://user-images.githubusercontent.com/13843979/45023156-82a8fb80-b068-11e8-9dea-43ab33fed422.png)





### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]: 4.0.4
+ Browser version [浏览器类型和版本]: chrome 68
+ OS Version [操作系统类型和版本]:





### Expected behaviour [期望结果]





### ECharts option [ECharts配置项]
<!-- Copy and paste your 'echarts option' here. -->
<!-- [下方贴你的option，注意不要删掉下方 ```javascript 和 尾部的 ``` 字样。最好是我们能够直接运行的 
option。如何得到能运行的 option 参见上方的 guidelines for contributing] -->
```javascript

options.xAxis.axisLabel.showMinLabel = true
  options.xAxis.splitLine = { show: false }
  options.series = []
  options.legend.data = []
  options.legend.right = '60'
  options.xAxis.data = xList
  options.yAxis.min = 0
  options.toolbox = { right: '30', itemSize: 14, top: '2.5%' }
  options.tooltip = {
    trigger: 'axis',
    axisPointer: {
      type: 'shadow',
    },
    backgroundColor: 'rgba(40, 40, 48, 1)',
    padding: [10, 15],
    formatter: item => {
      let str = item[0].axisValueLabel + '<br/>' + colorSpan1 + time + ' / ' + 
item[0].seriesName + ' : ' + item[0].value + '<br/>'
      if (data2) {
        str += colorSpan2 + compareTime + ' / ' + item[0].seriesName + ' : ' + 
item[1].value
      }
      return str
    },

  }
  options.grid.top = "8%"
  for (let i in model) {
    if (i !== 'timeList' && i !== 'timeDate') {
      options.series.push({
        data: d1,
        type: 'bar',
        name: i,
        barMaxWidth: 40,
        itemStyle: {
          normal: {
            color: {
              colorStops: [
                { offset: 0, color: "#FDAC02" },
                { offset: 1, color: "#79C230" },
              ],
              global: false,
              type: "linear",
              x: 0,
              x2: 0,
              y: 0,
              y2: 1,
            },
          },
        },
      })
    }
  }

  if (data2) {
    for (let i in data2) {
      if (i !== 'timeList' && i !== 'timeDate') {
        options.series.push({
          data: d3,
          type: 'bar',
          name: i,
          barMaxWidth: 40,
          itemStyle: {
            normal: {
              color: {
                colorStops: [
                  { offset: 0, color: "#FDAC02" },
                  { offset: 1, color: "#79C230" },
                ],
                global: false,
                type: "linear",
                x: 0,
                x2: 0,
                y: 0,
                y2: 1,
              },
            },
          },
        })
      }
    }
  }
```




### Other comments [其他信息]
<!-- For example: Screenshot or Online demo -->
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[ Full content available at: 
https://github.com/apache/incubator-echarts/issues/9008 ]
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