hoangv commented 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 your minimum example, it uses the first data point, which unfortunately happens to be the one missing GSWY dimension. It seems resonable to first check the data and dimensions beforehand. If you aren't able to check your data and dimensions beforehand, 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 you want to plot. For example: ``` "dataset": { "source": [ { "timestamp": 1568191140000, "ECM": 1666775.3333333333, "GSWY": 1332.5333333333333, }, { "timestamp": 1568191020000, "ECM": 26311.466666666667, }, ] ``` 2) Explicitly specify all your 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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