webxiaobian opened a new issue #9737: 折线图多条线数据处理问题
URL: https://github.com/apache/incubator-echarts/issues/9737
 
 
   在使用折线图时 我发现echarts和antv对比以后,发现如果数据中的点和时间是对应的 但是 在某类数据中可能不会返回这个时间点的数据 
而是返回了一个其他时间点的数据。这个时候渲染处理数据应该怎么做呢?
   const data = [
     { type: '序列1', year: '1991', value: 3 },
     { type: '序列1', year: '1992', value: 4 },
     { type: '序列1', year: '1993', value: 3.5 },
     { type: '序列1', year: '1994', value: 5 },
     { type: '序列1', year: '1995', value: 4.9 },
     { type: '序列1', year: '1996', value: 6 },
     { type: '序列1', year: '1997', value: 7 },
     { type: '序列1', year: '1998', value: 9 },
     { type: '序列1', year: '1999', value: 13 },
     { type: '序列2', year: '1991', value: 6 },
     { type: '序列2', year: '1992', value: 8 },
     { type: '序列2', year: '1993', value: 5.5 },
     { type: '序列2', year: '1994', value: 7 },
     { type: '序列2', year: '1995', value: 9.9 },
     { type: '序列2', year: '1996', value: 6 },
     { type: '序列2', year: '1997', value: 5 },
     { type: '序列2', year: '2000', value: 10 },
     { type: '序列2', year: '1999', value: 19 },
     { type: '序列3', year: '1991', value: 2 },
     { type: '序列3', year: '1992', value: 6 },
     { type: '序列3', year: '1993', value: 9 },
     { type: '序列3', year: '1994', value: 10 },
     { type: '序列3', year: '1995', value: 15 },
     { type: '序列3', year: '1996', value: 8 },
     { type: '序列3', year: '1997', value: 5 },
     { type: '序列3', year: '1998', value: 4.6 },
     { type: '序列3', year: '2000', value: 4 },
   ];
   
   
![image](https://user-images.githubusercontent.com/37388788/51027248-50d21380-15cb-11e9-9d6a-9c5132838391.png)
   应该是要像这样的展示
   

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