hoangv edited a comment on issue #11322: Bar chart pick the wrong data in dataset. URL: https://github.com/apache/incubator-echarts/issues/11322#issuecomment-568119522 @icetimidus I spent some time studying this bug and reading [the documentation](https://www.echartsjs.com/en/option.html#dataset.source). It appears the library allows the option to specify the dimensions for dataset.source. When not explicitly specified, it makes a best-effort to detect dimensions on its own. In the minimum example, it uses the first data point, which unfortunately happens to be the one missing GSWY dimension. It seems reasonable to first check the data and dimensions beforehand. If not possible, there are a couple options. 1) In the minimal example, reverse the order of dataset.source so the first data point contains all the dimensions. For example: ``` "dataset": { "source": [ { "timestamp": 1568191140000, "ECM": 1666775.3333333333, "GSWY": 1332.5333333333333, }, { "timestamp": 1568191020000, "ECM": 26311.466666666667, }, ] ``` 2) If not, try explicitly specifying all dimensions in option.series ``` "series": [{ "type": "bar", "name": "ECM", "dimensions": ['timestamp','ECM','GSWY'], "encode": { "x": "timestamp", "y": "ECM" }, "stack": "one", "itemStyle": { "normal": { "color": "#2ec7c9" } } }, { "type": "bar", "name": "GSWY", "dimensions": ['timestamp','ECM','GSWY'], "encode": { "x": "timestamp", "y": "GSWY" }, "stack": "one", "itemStyle": { "normal": { "color": "#97b552" } } } ], ``` Hope this helps. Cc. @Ovilia
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