Ovilia commented on issue #9151: Echarts Legend Not Appearing Using Dataset & Dimensions URL: https://github.com/apache/incubator-echarts/issues/9151#issuecomment-427715165 You have to set legend with series name. ```js option = { legend: { data: ['a', 'b'] }, dataset: [{ source: [ ['Test1', 10], ['Test2', 20] ], dimensions: ['Category', 'Value'] }, { source: [ ['Test1', 15], ['Test2', 25] ], dimensions: ['Category', 'Value2'] }], xAxis: [{ type: 'category' }, { type: 'category' }], yAxis: [{ position: 'left' }, { position: 'right' }], series: [ { name: 'a', type: 'line', encode: { x: 'Category', y: 'Value' }, datasetIndex: 0, yAxisIndex: 0 }, { name: 'b', type: 'line', encode: { x: 'Category', y: 'Value2' }, datasetIndex: 1, yAxisIndex: 1 } ], color: ["#c22e34", "#e7b603", "#0097da", "#2b821e", "#035daa", "#339ca8"] }; ```
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