echarts图自适应

var myChart2 = echarts.init(document.getElementById('img_2'));
option2 = {
    title: {
        text: '存量中各学历段情况',
        x:'center'
    },
    legend: {
        orient: 'vertical',
        x: 'left',
        y: '30',
        data:name
    },
    grid: {
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
    },
    tooltip: {
        trigger: 'item',
        formatter: "{a} 
{b}: {c} ({d}%)"
    },
    series: [
        {
            name: '学历占比',
            type: 'pie',
            radius: [0, '40%'],
            data:zt
        },
    ]

};
myChart2.setOption(option2);
var myChart3 = echarts.init(document.getElementById('img_3'));
option3 = {
    title: {
        text: '正常卡量中各学历段情况',
        x:'center'
    },
    legend: {
        orient: 'vertical',
        x: 'left',
        y: '30',
        data:name
    },
    tooltip: {
        trigger: 'item',
        formatter: "{a} 
{b}: {c} ({d}%)"
    },
    series: [
        {
            name: '学历占比',
            type: 'pie',
            radius: [0, '40%'],
            data:zc
        },
    ]

};
myChart3.setOption(option3);

var resizeTimer = null;
$(window).bind('resize', function () {
    if (resizeTimer) clearTimeout(resizeTimer);
    resizeTimer = setTimeout(function () {
        var reset = myChart2.resize;
        reset();
        var reset1 = myChart3.resize;
        reset1();
    }, 100);
});