mirror of
https://github.com/alwxkxk/soft-and-hard.git
synced 2025-02-04 06:42:54 +08:00
56 lines
1.7 KiB
HTML
56 lines
1.7 KiB
HTML
<!DOCTYPE html>
|
||
<html lang="en">
|
||
<head>
|
||
<meta charset="UTF-8">
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||
<meta http-equiv="X-UA-Compatible" content="ie=edge">
|
||
<title>可视化基础教程</title>
|
||
</head>
|
||
<body>
|
||
<!-- 引入Echart脚本 -->
|
||
<script src="https://cdn.bootcss.com/echarts/4.2.0-rc.2/echarts.min.js"></script>
|
||
<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
|
||
<div id="main" style="width: 600px;height:400px;"></div>
|
||
<script type="text/javascript">
|
||
// 基于准备好的dom，初始化echarts实例
|
||
var myChart = echarts.init(document.getElementById('main'));
|
||
|
||
// 指定图表的配置项和数据
|
||
var option = {
|
||
title: {
|
||
text: '实时温度'
|
||
},
|
||
xAxis: {
|
||
type: 'category',
|
||
data: []
|
||
},
|
||
yAxis: {
|
||
type: 'value'
|
||
},
|
||
series: [{
|
||
data: [],
|
||
type: 'line',
|
||
smooth: true
|
||
}]
|
||
};
|
||
|
||
// 使用刚指定的配置项和数据显示图表。
|
||
myChart.setOption(option);
|
||
|
||
setInterval(function () {
|
||
var tem = 20 + Math.random().toFixed(2) * 10;
|
||
tem = tem.toFixed(2); // 随机数模拟温度，只保留两位小数
|
||
var time = new Date();
|
||
option.xAxis.data.push(time.getMinutes()+':'+time.getSeconds());//给X轴 插入时间数据
|
||
option.series[0].data.push(tem);//给Y轴 插入温度数据
|
||
|
||
// 如果数据超过30个，把第一个数据删除。
|
||
if(option.xAxis.data.length > 30){
|
||
option.xAxis.data.shift()
|
||
option.series[0].data.shift()
|
||
}
|
||
myChart.setOption(option);
|
||
}, 1000);
|
||
</script>
|
||
</body>
|
||
</html> |