option = { legend: {}, tooltip: {}, dataset: { source: [ ['product', '2015', '2016', '2017'], ['Matcha Latte', 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, 390.1] ] }, xAxis: { type: 'category' }, yAxis: [{ type: 'value' }, { type: 'value' }], // Declare several bar series, each will be mapped // to a column of dataset.source by default. series: [{ type: 'bar' }, { type: 'bar' }, { type: 'bar', yAxisIndex: 1 }, ] };