代码
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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<title>Echarts Example</title>
</head>
<body>
<div id="main" style="width: 600px;height: 400px"></div>
<script src="//cdn.bootcss.com/echarts/4.5.0/echarts.js"></script>
<script type="text/javascript">
var myChart = echarts.init(document.getElementById('main'));
var data = [];
for (var i = 0; i <= 360; i++) {
var x = (i / 360) * Math.PI;
// 花瓣图公式：
// r = a + b * |sin(c * θ)|
var r = 4 + 20 * Math.abs(Math.sin(8 * x));
data.push([r, i]);
}
var option = {
toolbox: {
feature: {
saveAsImage: {},
},
},
polar: {},
angleAxis: { type: 'value', startAngle: 0 },
radiusAxis: { min: 0 },
series: [{ showSymbol: false, coordinateSystem: 'polar', type: 'line', data: data }],
};
myChart.setOption(option);
</script>
</body>
</html>
运行结果