x: maxValue,
                        dimension: 2,
                        calculable: true
                    },
                    angleAxis: {
                        type: 'category',
                        data: hours,
                        boundaryGap: false,
                        splitLine: {
                            show: true,
                            lineStyle: {
                                color: '#ddd',
                                type: 'dashed'
                            }