echarts 色块+折线图

效果图如下：

 具体实现代码如下：

const hours = ['周日', '周一', '周二', '周三', '周四', '周五', '周六'];
const days = ['23:00', '22:00', '21:00', '20:00', '19:00', '18:00', '17:00', '16:00', '15:00', '14:00', '13:00', '12:00', '11:00', '10:00', '09:00', '08:00', '07:00', '06:00', '05:00', '04:00', '03:00', '02:00', '01:00', '00:00'];
const data = [[0, 0, 5.23], [0, 1, 1], [0, 2, 0], [0, 3, 0], [0, 4, 0], [0, 5, 0], [0, 6, 0], [0, 7, 0], [0, 8, 0], [0, 9, 0], [0, 10, 0], [0, 11, 2], [0, 12, 4], [0, 13, 1], [0, 14, 1], [0, 15, 3], [0, 16, 4], [0, 17, 6], [0, 18, 4], [0, 19, 4], [0, 20, 3], [0, 21, 3], [0, 22, 2], [0, 23, 5], [1, 0, 7], [1, 1, 0], [1, 2, 0], [1, 3, 0], [1, 4, 0], [1, 5, 0], [1, 6, 0], [1, 7, 0], [1, 8, 0], [1, 9, 0], [1, 10, 5], [1, 11, 2], [1, 12, 2], [1, 13, 6], [1, 14, 9], [1, 15, 11], [1, 16, 6], [1, 17, 7], [1, 18, 8], [1, 19, 12], [1, 20, 5], [1, 21, 5], [1, 22, 7], [1, 23, 2], [2, 0, 1], [2, 1, 1], [2, 2, 0], [2, 3, 0], [2, 4, 0], [2, 5, 0], [2, 6, 0], [2, 7, 0], [2, 8, 0], [2, 9, 0], [2, 10, 3], [2, 11, 2], [2, 12, 1], [2, 13, 9], [2, 14, 8], [2, 15, 10], [2, 16, 6], [2, 17, 5], [2, 18, 5], [2, 19, 5], [2, 20, 7], [2, 21, 4], [2, 22, 2], [2, 23, 4], [3, 0, 7], [3, 1, 3], [3, 2, 0], [3, 3, 0], [3, 4, 0], [3, 5, 0], [3, 6, 0], [3, 7, 0], [3, 8, 1], [3, 9, 0], [3, 10, 5], [3, 11, 4], [3, 12, 7], [3, 13, 14], [3, 14, 13], [3, 15, 12], [3, 16, 9], [3, 17, 5], [3, 18, 5], [3, 19, 10], [3, 20, 6], [3, 21, 4], [3, 22, 4], [3, 23, 1], [4, 0, 1], [4, 1, 3], [4, 2, 0], [4, 3, 0], [4, 4, 0], [4, 5, 1], [4, 6, 0], [4, 7, 0], [4, 8, 0], [4, 9, 2], [4, 10, 4], [4, 11, 4], [4, 12, 2], [4, 13, 4], [4, 14, 4], [4, 15, 14], [4, 16, 12], [4, 17, 1], [4, 18, 8], [4, 19, 5], [4, 20, 3], [4, 21, 7], [4, 22, 3], [4, 23, 0], [5, 0, 2], [5, 1, 1], [5, 2, 0], [5, 3, 3], [5, 4, 0], [5, 5, 0], [5, 6, 0], [5, 7, 0], [5, 8, 2], [5, 9, 0], [5, 10, 4], [5, 11, 1], [5, 12, 5], [5, 13, 10], [5, 14, 5], [5, 15, 7], [5, 16, 11], [5, 17, 6], [5, 18, 0], [5, 19, 5], [5, 20, 3], [5, 21, 4], [5, 22, 2], [5, 23, 0], [6, 0, 1], [6, 1, 0], [6, 2, 0], [6, 3, 0], [6, 4, 0], [6, 5, 0], [6, 6, 0], [6, 7, 0], [6, 8, 0], [6, 9, 0], [6, 10, 1], [6, 11, 0], [6, 12, 2], [6, 13, 1], [6, 14, 3], [6, 15, 4], [6, 16, 0], [6, 17, 0], [6, 18, 0], [6, 19, 0], [6, 20, 1], [6, 21, 2], [6, 22, 2], [6, 23, 6]]
    .map(function (item) {
        return [item[1], item[0], item[2] || '-'];
    });

// 计算每天的平均拥堵指数
const dayAvgData = [];
for (let day = 0; day < 7; day++) {
    const dayData = data.filter(item => item[0] === day);
    const sum = dayData.reduce((acc, item) => acc + (item[2] === '-' ? 0 : item[2]), 0);
    const avg = sum / dayData.length;
    dayAvgData.push(avg);
}

option = {
    tooltip: {
        position: 'top',
        formatter: function(params) {
            if (params.componentType === 'series') {
                if (params.seriesType === 'heatmap') {
                    return `${hours[params.value[1]]} ${days[params.value[0]]}<br/>拥堵指数: ${params.value[2]}`;
                } else if (params.seriesType === 'line') {
                    return `${hours[params.dataIndex]}<br/>平均拥堵指数: ${params.value.toFixed(2)}`;
                }
            }
        }
    },
    grid: {
        left: '55px',
        top: '20px',
        bottom: '10px',
        right: '25px',
        containLabel: true,
    },
    xAxis: {
        type: 'category',
        data: hours,
        splitArea: {
            show: false
        },
        axisLine: {
            lineStyle: {
                color: '#D7DBE0',
                borderType: [5, 10],
                borderDashOffset: 5
            }
        },
        axisLabel: {
            color: '#666666',
        },
        axisTick: {
            show: false
        }
    },
    yAxis: [
        {
            type: 'category',
            data: days,
            splitArea: {
                show: false
            },
            axisLine: {
                show: false
            },
            axisTick: {
                show: false
            }
        },
        {
            type: 'value',
            show: false,
            min: 0,
            max: 10
        }
    ],
    visualMap: {
        type: 'piecewise',
        min: 0,
        max: 10,
        orient: 'horizontal',
        precision: 2,
        padding: 5,
        borderWidth: 1,
        borderColor: '#FFFFFF',
        show: false,
        pieces: [
            {
                gt: 0,
                lte: 2,
                color: '#25B06E'
            },
            {
                gt: 2,
                lte: 4,
                color: '#DDA427'
            },
            {
                gt: 4,
                lte: 6,
                color: '#E54C44'
            },
            {
                gt: 6,
                color: '#AA1F18'
            }
        ],
        outOfRange: {
            color: '#999'
        }
    },
    series: [
        {
            name: '拥堵指数',
            type: 'heatmap',
            data: data,
            label: {
                show: false
            },
            itemStyle: {
                borderWidth: 2,
                borderColor: '#FFFFFF',
            },
            emphasis: {
                itemStyle: {
                    shadowOffsetY: 2,
                    shadowBlur: 6,
                    shadowColor: 'rgba(0, 0, 0, 0.5)'
                }
            }
        },
        {
            name: '平均拥堵指数',
            type: 'line',
            xAxisIndex: 0,
            yAxisIndex: 1,
            data: dayAvgData,
            smooth: true,
            symbol: 'circle',
            symbolSize: 8,
            lineStyle: {
                width: 3,
                color: '#1890FF'
            },
            itemStyle: {
                color: '#1890FF',
                borderWidth: 2,
                borderColor: '#fff'
            },
            zlevel: 1
        }
    ]
};