[GitHub] [incubator-echarts] fernando1987 opened issue #8928: 在使用dateset管理数据时，如果数据中出现“set”关键字，会导致图表渲染错误

[GitHub]

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### One-line summary [问题简述]
在使用dateset管理数据时，如果数据中出现“set”关键字，会导致图表渲染错误。
 source: [
            ['product', '2015', '2016', '2017'],
            ['set', 43.3, 85.8, 93.7],
            ['Milk Tea', 83.1, 73.4, 55.1],
            ['Cheese Cocoa', 86.4, 65.2, 82.5],
            ['Walnut Brownie', 72.4, 53.9, 39.1]
]

错误如下：
editor.js?_v_=1526486305040:434 TypeError: n.set is not a function
at Ks.cT.parseAndCollect (echarts.min.js?_v_=1526486305040:22)

### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]:4.0.1
+ Browser version [浏览器类型和版本]:
+ 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
option = {
    legend: {},
    tooltip: {},
    dataset: {
        source: [
            ['product', '2015', '2016', '2017'],
            ['set', 43.3, 85.8, 93.7],
            ['Milk Tea', 83.1, 73.4, 55.1],
            ['Cheese Cocoa', 86.4, 65.2, 82.5],
            ['Walnut Brownie', 72.4, 53.9, 39.1]
        ]
    },
    xAxis: {type: 'category'},
    yAxis: {},
    // Declare several bar series, each will be mapped
    // to a column of dataset.source by default.
    series: [
        {type: 'bar'},
        {type: 'bar'},
        {type: 'bar'}
    ]
};

```




### Other comments [其他信息]
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<!-- [例如，截图或线上实例 (JSFiddle/JSBin/Codepen)] -->



[ Full content available at: 
https://github.com/apache/incubator-echarts/issues/8928 ]
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