数据可视化大屏项目开发中，客户要求横向柱状图横坐标只显示最大值和最小值，这里将实现代码记录下来。

实例代码

drawEcharts() {
      window.addEventListener('resize', this.drawEcharts)
      // 基于准备好的dom，初始化echarts实例
      let myChart = echarts.init(this.$refs.echarts)
      var list = this.list.map(obj => obj.value)
      let min = Math.min(...list);
      let max = Math.max(...list);
      var option = {
        grid: {
          top: '20px',
          bottom: '10px',
          left: '20px',
          right: '20px',
          containLabel: true
        },
        tooltip: {
          trigger: 'axis'
        },
        legend: {
          top: 0,
          right: 20,
          show: false,
          itemWidth: 10,
          itemHeight: 10,
          textStyle: {
            color: 'rgba(157, 185, 233, 1)',
            fontSize: '12'
          },
        },
        xAxis: [{
          type: 'value',
          splitNumber: 1,
          min: min,
          max: max,
          axisLabel: {
            margin: 10,
            interval: 0,
            color: 'rgba(220, 254, 255, 1)',
            textStyle: {
              fontSize: 10,
              fontFamily: 'fengguangmingrui',
            },
            formatter: function (value) {
              if (value === min || value === max) {
                return value;
              } else {
                return '';
              }
            }
          },
          axisLine: {
            lineStyle: {
              color: 'rgba(8, 61, 98, 1.00)',
              type: 'dashed',
              width: 1,
            }
          },
          splitLine: {
            show: true,
            lineStyle: {
              color: 'rgba(255, 255, 255, 0.12)',
              width: 1,
              type: 'dashed',
            }
          },
          axisTick: {
            show: false
          },
        }],

        yAxis: [
          {
            type: 'category',
            data: this.list.map(obj => obj.name),
            axisLabel: {
              color: 'rgba(204, 217, 229, 1)',
              textStyle: {
                fontSize: 13,
                fontFamily: 'fengguangmingrui',
              },
            },
            axisLine: {
              lineStyle: {
                color: 'rgba(8, 61, 98, 1.00)',
                type: 'dashed',
                width: 1,
              }
            },
            axisTick: {
              show: false
            },
            splitLine: {
              show: false,
              lineStyle: {
                color: 'rgba(8, 61, 98, 1.00)',
                type: 'dashed',
                width: 1,
              }
            }
          }],
        series: [
          {
            name: '发电量',
            type: 'bar',
            data: this.list.map(obj => obj.value),
            barWidth: '10',
            itemStyle: {
              normal: {
                color: (params) => {
                  let colorList = [{
                    color1: 'rgba(0, 255, 156, 1)',
                    color2: 'rgba(0, 255, 156, 0.1)',
                  }, {
                    color1: 'rgba(249, 152, 25, 1)',
                    color2: 'rgba(249, 152, 25, 0.1)',
                  }, {
                    color1: 'rgba(94, 238, 255, 1)',
                    color2: 'rgba(94, 238, 255, 0.1)',
                  },];
                  let index = params.dataIndex % colorList.length;
                  return new echarts.graphic.LinearGradient(0, 0, 1, 0, [{
                    offset: 0,
                    color: colorList[index].color1
                  }, {
                    offset: 1,
                    color: colorList[index].color2
                  }], false);
                },
              }
            },
            markPoint: {
              symbol: 'path://M62 62h900v900h-900v-900z', // 使用 SVG path 绘制扁圆形状
              symbolSize: [3, 10], // 设置扁圆的宽和高
              data: this.list.map((obj, index) => {
                let colorList = [{
                  color1: 'rgba(0, 255, 156, 1)',
                  color2: 'rgba(0, 255, 156, 0.1)',
                }, {
                  color1: 'rgba(249, 152, 25, 1)',
                  color2: 'rgba(249, 152, 25, 0.1)',
                }, {
                  color1: 'rgba(94, 238, 255, 1)',
                  color2: 'rgba(94, 238, 255, 0.1)',
                },];
                let colorIndex = index % colorList.length;
                return {
                  yAxis: index, // 对应柱子的横坐标
                  xAxis: obj.value + 0, // 柱子的值加上一些偏移量
                  name: index, // 添加这个属性
                  itemStyle: {
                    color: colorList[colorIndex].color1, // 直接设置颜色
                  },
                };
              })
            }
          }
        ]
      }
      myChart.clear()
      myChart.resize()
      myChart.setOption(option)
    },