柱状图堆叠

描述:当前是关于Echarts图表中的 示例。
 
            option = {
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'cross',
      crossStyle: {
        color: '#999'
      }
    }
  },
  toolbox: {
    feature: {
      dataView: { show: true, readOnly: false },
      magicType: { show: true, type: ['line', 'bar'] },
      restore: { show: true },
      saveAsImage: { show: true }
    }
  },
  legend: {
    data: ['Evaporation', 'Precipitation', 'Temperature']
  },
  xAxis: [
    {
      type: 'category',
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      axisPointer: {
        type: 'shadow'
      }
    }
  ],
  yAxis: [
    {
      type: 'value',
      name: 'Precipitation',
      min: 0,
      max: 250,
      interval: 50,
      axisLabel: {
        formatter: '{value} ml'
      }
    },
    {
      type: 'value',
      name: 'Temperature',
      min: 0,
      max: 25,
      interval: 5,
      axisLabel: {
        formatter: '{value} °C'
      }
    }
  ],
  series: [
    {
      name: 'Evaporation',
      type: 'bar',
      // stack: 'negative',
      tooltip: {
        valueFormatter: function (value) {
          return value + ' ml';
        }
      },
      data: [
        2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6
      ]
    },


    {
      name: 'Temperature',
      type: 'bar',
      stack: 'total',
      barGap :'-100%',
       itemStyle: {
        borderColor: 'transparent',
        color: 'transparent'
      },
      emphasis: {
        itemStyle: {
          borderColor: 'transparent',
          color: 'transparent'
        }
      },
      yAxisIndex: 1,
      tooltip: {
        valueFormatter: function (value) {
          return value + ' °C';
        }
      },
      data: [20.0, 20.0,20.0,20.0,20.0,20.0,20.0]
    },
        {
      name: 'Temperature',
      type: 'bar',
      stack: 'total',
      barGap :'-100%',
      yAxisIndex: 1,
      tooltip: {
        valueFormatter: function (value) {
          return value + ' °C';
        }
      },
      data: [12.0, 2.0,12.0,2.0,12.0,12.0,20.0]
    },
  ]
};