echarts实现3个y轴的图表

			option: {xAxis: {type: 'category',data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun', 'Mon', 'Tue', 'Wed', 'Thu',]},// 三个y轴yAxis: [{type: 'value',name: '蒸发量',min: 0,max: 250,position: 'right',axisLine: {lineStyle: {color: 'green'}},axisLabel: {formatter: '{value} ml'}},{type: 'value',name: '降水量',min: 0,max: 250,position: 'left',offset: 80, // y轴位置的偏移量axisLine: {lineStyle: {color: 'yellow'}},axisLabel: {formatter: '{value} ml'}},{type: 'value',name: '温度',min: 0,max: 25,position: 'left',axisLine: {lineStyle: {color: 'blue'}},axisLabel: {formatter: '{value} °C'}}],series: [{name: '蒸发量',type: 'bar',data: [2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3]},{name: '降水量',type: 'bar',yAxisIndex: 1, // 对应的y轴的索引值(因为有多个y轴)data: [2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0, 2.3]},{name: '平均温度',type: 'bar',yAxisIndex: 2, // 对应y轴的索引值(因为有多个y轴)data: [2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2]}]}