折线图splitLine与axisLabel疑问

描述:当前是关于Echarts图表中的 折线图 示例。
 
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xid='315'>2.9834</value><value xid='316'>2.9849</value><value xid='317'>2.9863</value><value xid='318'>2.9878</value><value xid='319'>2.9892</value><value xid='320'>2.9907</value><value xid='321'>2.9921</value><value xid='322'>2.9936</value><value xid='323'>2.9950</value><value xid='324'>2.9964</value><value xid='325'>2.9979</value><value xid='326'>2.9993</value><value xid='327'>3.0008</value><value xid='328'>3.0022</value><value xid='329'>3.0037</value><value xid='330'>3.0051</value><value xid='331'>3.0066</value><value xid='332'>3.0080</value><value xid='333'>3.0094</value><value xid='334'>3.0109</value><value xid='335'>3.0123</value><value xid='336'>3.0138</value><value xid='337'>3.0152</value><value xid='338'>3.0167</value><value xid='339'>3.0181</value><value xid='340'>3.0196</value><value xid='341'>3.0210</value><value xid='342'>3.0224</value><value xid='343'>3.0239</value><value xid='344'>3.0253</value><value xid='345'>3.0268</value><value xid='346'>3.0282</value><value xid='347'>3.0297</value><value xid='348'>3.0311</value><value xid='349'>3.0326</value><value xid='350'>3.0340</value><value xid='351'>3.0354</value><value xid='352'>3.0369</value><value xid='353'>3.0383</value><value xid='354'>3.0398</value><value xid='355'>3.0412</value><value xid='356'>3.0427</value><value xid='357'>3.0441</value><value xid='358'>3.0456</value></graph></graphs></chart>"
var chartData = {
    xLabel: [],
    xLabelShow: [],
    value: []
};

$(data).find('xaxis').each(function() {
    $(this).find('value').each(function() {
        var $this = $(this);
        chartData.xLabel.push($this.text());
        if ($this.attr('show')) {
            chartData.xLabelShow.push($this.text());
        }
    });
});
$(data).find('graph:eq(0)').each(function() {
    $(this).find('value').each(function() {
        chartData['value'][$(this).attr('xid')] = $(this).text();
    })
});
console.log(chartData);
option = {
    title: {
        text: '曲线title',
        x: 'center'
    },
    tooltip: {
        show: true,
        trigger: 'axis',
        axisPointer: {
            type: 'line',
            axis: 'x'
        }
    },
    //水印
    graphic: {
        type: 'text',
        style: {
            text: 'chinamoney',
            font: '1em "Arial,Helvetica",sans-serif',
            fill: '#666'
        },
        right: '20%',
        bottom: '20%'
    },
    grid: {
        show: true,
        left: '10%',
        right: '10%'
    },
    xAxis: {
        type: 'category',
        data: chartData['xLabel'],
        name: '期限',
        nameLocation: 'end',
        boundaryGap: false,
        axisLine: {
            show: true,
            onZero: false
        },
        axisTick: {
            show: false,
            alignWidthLabel: true,
        },
        boundaryGap: true,
        //x坐标轴标签展示
        axisLabel: {
            show: true,
            interval: function(index, name) {
                if (chartData['xLabelShow'].indexOf(name) >= 0) {
                    return true;
                }
            },
            showMinLabel: true,
            showMaxLabel: true,
            align: 'center'
        },
        //x轴分割线展示
        splitLine: {
            show: true,
            interval: function(index, name) {
                if (chartData['xLabelShow'].indexOf(name) >= 0) {
                    return true;
                }
            }
        },
        scale: true
    },
    yAxis: {
        type: 'value',
        boundaryGap: false,
        //坐标轴线
        axisLine: {
            show: true,
            onZero: false
        },
        //刻度
        axisTick: {
            show: false,
            alignWidthLabel: true,
        },
        axisLabel: {
            formatter: function(value, index) {
                return value.toFixed(4);
            }
        },
        splitLine: {
            show: true
        },
        name: '%',
        nameLocation: 'end',
        //boundaryGap:true,
        scale: true, //取消从0开始

    },

    series: [{
        type: 'line',
        name: 'example',
        data: chartData['value'],
        symbol: 'none',
        connnectNulls: true,
    }]
}