echarts图表X轴只显示时分 Y轴显示日期的散点图

针对设备开关机、告警、停机等事件标记的散点图

• echartsX轴固定为时分（24小时），Y轴为具体日期
• • • 因为x轴只显示时分的话，只能代码生成固定[00:00~23:59]数组：
  • 在组件页面初始化图表
  • 图表展示

echartsX轴固定为时分（24小时），Y轴为具体日期

因为x轴只显示时分的话，只能代码生成固定[00:00~23:59]数组：

生成小时数组[00~23] 分钟数组[00~60] 代码.

/**
 * 生成时间格式基础字符串数组 
 * 生成24小时的数组 num=24
 * 生成60分钟的数组 num=60
 */
const timeArr = function (num: number) {
  let arr = [];
  for (let i = 0, j = num + 1; i < j; i++) {
    if (i < 10) {
      arr.push("0" + i);
    } else {
      arr.push("" + i);
    }
  }
  return arr;
};
//["00","01"...."23"]
//["00","01"..."60"]复制

将小时与分钟两数组合成 hh:mm 数组[00:00，00:01…，23:59] 代码. 其实也可以继续生成hh:mm:ss的数组，就是一层一层往下套

const time = (arr: string[], arr2: string[]) => {
  let len1 = arr.length;//小时数组长度
  let len2 = arr2.length;//分钟数组长度
  let end = [];
  let r = 0;
  while (r < len1) {
    for (let l = 0; l < len2; l++) {
      end.push(arr[r] + ":" + arr2[l]);
    }
    r++;
    continue;
  }
  return end;
};
//1440个字符串数组复制

在组件页面初始化图表

const eventEchartsRef = ref<HTMLDivElement>(); //获取图表展示的dom 事件散点图
const eventEchart = echarts.init(eventEchartsRef.value as HTMLDivElement);
//你可以手写也可以用第一个方法生成这两个数组
const hour = ['00', '01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24']
const min = ['00', '01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '60']
  let eventOption = {
    title: {
      text: "设备事件概览",
    },
    grid: {
      left: "3%",
      right: "7%",
      bottom: "7%",
      containLabel: true,
    },
    tooltip: {
      axisPointer: {
        show: true,
        type: "cross",
        lineStyle: {
          type: "dashed",
          width: 1,
        },
      },
      showDelay: 0,
      formatter: function (params: any) {
        if (params.value.length > 1) {
          return (
            params.seriesName +
            " :<br/>" +
            params.value[0] +
            " " +
            params.value[1] +
            " "
          );
        } else {
          return (
            params.seriesName +
            " :<br/>" +
            params.name +
            " : " +
            params.value +
            " "
          );
        }
      },
    },
    toolbox: {
      feature: {
        dataZoom: {},
        brush: {
          type: ["rect", "polygon", "clear"],
        },
      },
    },
    brush: {},
    legend: {
      data: [
        {
          name: "开机",
          // 强制设置图形为三角。
          icon: "triangle",
        },
        {
          name: "关机",
          // 强制设置图形为圆。
          icon: "circle",
        },
      ],
      left: "center",
      bottom: 10,
    },
    xAxis: [
      {
        type: 'category',//离散数据设置成category
        boundaryGap: false,
        axisLine: { onZero: false },
        data: time(hour, min),//time方法会返回24小时时分的字符串数组
        show: true,
      },
    ],
    yAxis: [
      {
        type: "category",//离散数据设置成category
        scale: true,
        splitLine: {
          show: false,
        },
      },
    ],
    series: [
      {
        name: "开机",
        type: "scatter",
        emphasis: {
          focus: "series",
        },
        // 开机数据
        data: [
          ['11:00', "2011-10-1"],
          ['09:33', "2011-10-2"],
          ['12:33', "2011-10-3"],
          ['12:33', "2011-10-4"],
          ['09:33', "2011-10-5"],
          ['12:33', "2011-10-6"],
          ['09:33', "2011-10-7"],
          ['09:33', "2011-10-8"],
          ['02:33', "2011-10-9"],
          ['11:00', "2011-10-10"],
        ],
        itemStyle: {
          borderColor: "green",
          color: "green",
        },
        markArea: {
          silent: true,
          itemStyle: {
            color: "transparent",
            borderWidth: 1,
            borderType: "dashed",
          },
          data: [
            [
              {
                name: "开机",
                xAxis: "min",
                yAxis: "min",
              },
              {
                xAxis: "max",
                yAxis: "max",
              },
            ],
          ],
        },
        symbol: "triangle",
      },
      //关机数据
      {
        name: "关机",
        type: "scatter",
        emphasis: {
          focus: "series",
        },
        // prettier-ignore
        data: [
          ['12:00', "2011-10-1"],
          ['12:30', "2011-10-2"],
          ['12:38', "2011-10-3"],
          ['12:37', "2011-10-4"],
          ['12:30', "2011-10-5"],
          ['12:39', "2011-10-6"],
          ['12:30', "2011-10-7"],
          ['12:30', "2011-10-8"],
          ['10:30', "2011-10-9"],
          ['12:00', "2011-10-10"],
        ],
        symbol: "circle",
        itemStyle: {
          borderColor: "red",
          color: "red",
        },
        markArea: {
          silent: true,
          itemStyle: {
            color: "transparent",
            borderWidth: 1,
            borderType: "dashed",
          },
          data: [
            [
              {
                name: "关机",
                xAxis: "min",
                yAxis: "min",
              },
              {
                xAxis: "max",
                yAxis: "max",
              },
            ],
          ],
        },
      },
    ],
  };复制

图表展示