关于echarts仪表盘设置起始与结束数值并设置显示数字个数中有三个字段设置，min为最小值，max为最大值，splitNumber为显示几个数值，用法为下。

实例1

option = {
    series: [{
        type: 'gauge',
        startAngle: 180,
        endAngle: 0,
        min: 0,
        max: 240,
        splitNumber: 12,
        itemStyle: {
            color: '#58D9F9',
            shadowColor: 'rgba(0,138,255,0.45)',
            shadowBlur: 10,
            shadowOffsetX: 2,
            shadowOffsetY: 2
        },
        progress: {
            show: true,
            roundCap: true,
            width: 18
        },
        pointer: {
            icon: 'path://M2090.36389,615.30999 L2090.36389,615.30999 C2091.48372,615.30999 2092.40383,616.194028 2092.44859,617.312956 L2096.90698,728.755929 C2097.05155,732.369577 2094.2393,735.416212 2090.62566,735.56078 C2090.53845,735.564269 2090.45117,735.566014 2090.36389,735.566014 L2090.36389,735.566014 C2086.74736,735.566014 2083.81557,732.63423 2083.81557,729.017692 C2083.81557,728.930412 2083.81732,728.84314 2083.82081,728.755929 L2088.2792,617.312956 C2088.32396,616.194028 2089.24407,615.30999 2090.36389,615.30999 Z',
            length: '75%',
            width: 16,
            offsetCenter: [0, '5%']
        },
        axisLine: {
            roundCap: true,
            lineStyle: {
                width: 18
            }
        },
        axisTick: {
            splitNumber: 2,
            lineStyle: {
                width: 2,
                color: '#999'
            }
        },
        splitLine: {
            length: 12,
            lineStyle: {
                width: 3,
                color: '#999'
            }
        },
        axisLabel: {
            distance: 30,
            color: '#999',
            fontSize: 20
        },
        title: {
            show: false
        },
        detail: {
            backgroundColor: '#fff',
            borderColor: '#999',
            borderWidth: 2,
            width: '60%',
            lineHeight: 40,
            height: 40,
            borderRadius: 8,
            offsetCenter: [0, '35%'],
            valueAnimation: true,
            formatter: function (value) {
                return '{value|' + value.toFixed(0) + '}{unit|km/h}';
            },
            rich: {
                value: {
                    fontSize: 50,
                    fontWeight: 'bolder',
                    color: '#777'
                },
                unit: {
                    fontSize: 20,
                    color: '#999',
                    padding: [0, 0, -20, 10]
                }
            }
        },
        data: [{
            value: 100
        }]
    }]
};

以上代码为设置了最大和最小值为0到240：显示12个数值

效果：

实例2：

option = {
    series: [{
        type: 'gauge',
        startAngle: 180,
        endAngle: 0,
        min: 0,
        max: 240,
        splitNumber: 6,
        itemStyle: {
            color: '#58D9F9',
            shadowColor: 'rgba(0,138,255,0.45)',
            shadowBlur: 10,
            shadowOffsetX: 2,
            shadowOffsetY: 2
        },
        progress: {
            show: true,
            roundCap: true,
            width: 18
        },
        pointer: {
            icon: 'path://M2090.36389,615.30999 L2090.36389,615.30999 C2091.48372,615.30999 2092.40383,616.194028 2092.44859,617.312956 L2096.90698,728.755929 C2097.05155,732.369577 2094.2393,735.416212 2090.62566,735.56078 C2090.53845,735.564269 2090.45117,735.566014 2090.36389,735.566014 L2090.36389,735.566014 C2086.74736,735.566014 2083.81557,732.63423 2083.81557,729.017692 C2083.81557,728.930412 2083.81732,728.84314 2083.82081,728.755929 L2088.2792,617.312956 C2088.32396,616.194028 2089.24407,615.30999 2090.36389,615.30999 Z',
            length: '75%',
            width: 16,
            offsetCenter: [0, '5%']
        },
        axisLine: {
            roundCap: true,
            lineStyle: {
                width: 18
            }
        },
        axisTick: {
            splitNumber: 2,
            lineStyle: {
                width: 2,
                color: '#999'
            }
        },
        splitLine: {
            length: 12,
            lineStyle: {
                width: 3,
                color: '#999'
            }
        },
        axisLabel: {
            distance: 30,
            color: '#999',
            fontSize: 20
        },
        title: {
            show: false
        },
        detail: {
            backgroundColor: '#fff',
            borderColor: '#999',
            borderWidth: 2,
            width: '60%',
            lineHeight: 40,
            height: 40,
            borderRadius: 8,
            offsetCenter: [0, '35%'],
            valueAnimation: true,
            formatter: function (value) {
                return '{value|' + value.toFixed(0) + '}{unit|km/h}';
            },
            rich: {
                value: {
                    fontSize: 50,
                    fontWeight: 'bolder',
                    color: '#777'
                },
                unit: {
                    fontSize: 20,
                    color: '#999',
                    padding: [0, 0, -20, 10]
                }
            }
        },
        data: [{
            value: 100
        }]
    }]
};

以上代码还是2至240的数值，但是只显示6个数值

效果：

注意：设置6会显示7个，因为0的起点不算在内。