ECharts3 实现动态数据累积图2+时间坐标

function randomData() {
now = new Date(+now + 1000);
value = value + Math.random() * 21 - 10;
return {
name: now.toString(),
value: [
now,
Math.round(value)
]
}
}
var data = [];
var now = new Date();
var value = Math.random() * 1000;

option = {
title: {
text: '动态数据 + 时间坐标轴'
},
tooltip: {
trigger: 'axis',
formatter: function (params) {
params = params[0];
var date = new Date(params.name);
return date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear() + ' : ' + params.value[1];
},
axisPointer: {
animation: false
}
},
xAxis: {
type: 'time',
splitLine: {
show: false
}
},
yAxis: {
type: 'value',
boundaryGap: [0, '100%'],
splitLine: {
show: false
}
},
series: [{
name: '模拟数据',
type: 'line',
showSymbol: false,
hoverAnimation: false,
data: data
}]
};

setInterval(function () {

//data.shift();
data.push(randomData());

myChart.setOption({
series: [{
data: data
}]
});
}, 1000);