Echarts动态数据可视化学习(2)柱状图和折线图的动态数据更新

xAxis：

xAxis: [
        {
            type: 'category',
            boundaryGap: true,
            data: (function (){
                var now = new Date();
                var res = [];
                var len = 10;
                while (len--) {
                    res.unshift(now.toLocaleTimeString().replace(/^\D*/,''));
                    now = new Date(now - 2000);
                }
                return res;
            })()
        },
        {
            type: 'category',
            boundaryGap: true,
            data: (function (){
                var res = [];
                var len = 10;
                while (len--) {
                    res.push(10 - len - 1);
                }
                return res;
            })()
        }
    ],

series：

series: [
        {
            name: '预购队列',
            type: 'bar',
            xAxisIndex: 1,
            yAxisIndex: 1,
            data: (function (){
                var res = [];
                var len = 10;
                while (len--) {
                    res.push(Math.round(Math.random() * 1000));
                }
                return res;
            })()
        },
        {
            name: '最新成交价',
            type: 'line',
            data: (function (){
                var res = [];
                var len = 0;
                while (len