ECharts · Example

option = {
   title: {
       text: "對數軸示例",
       x: "center"
   },
   tooltip: {
       trigger: "item",
       formatter: "{a} <br/>{b} : {c}"
   },
   legend: {
       x: 'left',
       data: ["2的指數", "3的指數"]
   },
   xAxis: [
       {
           type: "category",
           name: "x",
           splitLine: {show: false},
           data: ["一", "二", "三", "四", "五", "六", "七", "八", "九"]
       }
   ],
   yAxis: [
       {
           type: "log",
           logLabelBase: 3,
           splitNumber: 3,
           name: "y",
           axisLabel: {
                margin: '25',
                textStyle: {
                    align: 'left'
                }
           }
       }
   ],
    toolbox: {
       show: true,
       feature: {
           mark: {
               show: true
           },
           dataView: {
               show: true,
               readOnly: true
           },
           restore: {
               show: true
           },
           saveAsImage: {
               show: true
           }
       }
   },
   calculable: true,
   series: [
       {
           name: "3的指數",
           type: "line",
           data: [1, 3, 9, 27, 81, 247, 741, 2223, 6669]

},
       {
           name: "2的指數",
           type: "line",
           data: [1, 2, 4, 8, 16, 32, 64, 128, 256]

}
   ]
};

切換主題 axisLabel普通形式顯示負值log數軸