echarts.js 随着legend改变x轴

<script src="__PUBLIC__/Js/echarts.js"></script>

<div id="chartmain" style="width:600px; height: 350px;"></div>

var data_3=["2018-04-10", "2018-04-11", "2018-04-12"];
var data_4=["2018-04-10", "2018-04-11", "2018-04-12", "2018-04-13"];
var data_5=["2018-04-10", "2018-04-11", "2018-04-12", "2018-04-13", "2018-04-14"];
var data1=['1','2','3'];
var data2=['1','2','3','4'];
var data3=['1','2','3','4','5'];

var myChart = echarts.init(document.getElementById('chartmain'));
myChart.setOption({
    title:{
        text:'苏宁'
    },
    tooltip:{},
    legend:{
        data:['3天','4天','5天'],
        selectedMode : 'single'
    },
    xAxis:{
        data:data_3
    },
    yAxis:{},
    series:[
        {
            name:'3天',
            type:'line',
            data:data1
        },
        {
            name:'4天',
            type:'line',
            data:data2
        },
        {
            name:'5天',
            type:'line',
            data:data3
        }
    ]
})
myChart.on('legendselectchanged', function(obj) {
    var name=obj.name;
    var option=myChart.getOption();
    if(name=='30天'){
        option.xAxis[0].data=data_3;
    }else if(name=='60天'){
        option.xAxis[0].data=data_4;
    }else if(name=='90天'){
        option.xAxis[0].data=data_5;
    }
    myChart.setOption(option,true);
});

最后效果如下