使用Echarts绘制力导向图

前言

本文介绍了在VS Code中使用百度Echarts来绘制力导向图（Force-directred graph）。

参考文档

https://www.echartsjs.com/zh/tutorial.html
https://www.echartsjs.com/examples/zh/editor.html?c=graph-force

绘制力导向图

在VS Code中安装Live Server插件，用来做本地开发服务器，以解决异步加载图文件（.gexf）时的跨域问题。

准备需要用到的JavaScript文件放入./dist/目录下，包括Echarts, JQuery和dataTool：

https://echarts.baidu.com/dist/echarts.min.js
https://code.jquery.com/jquery-3.4.1.min.js
https://raw.githubusercontent.com/apache/incubator-echarts/master/dist/extension/dataTool.min.js

下载图文件（.gexf）样例放入./data/目录下：

http://echarts.baidu.com/gallery/data/asset/data/les-miserables.gexf

在项目根目录下创建graph-force.html文件，例如：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>ECharts</title>
    <!-- https://echarts.baidu.com/dist/echarts.js -->
    <!-- https://echarts.baidu.com/dist/echarts.min.js -->
    <script src="./dist/echarts.min.js"></script>
    <!-- https://code.jquery.com/jquery-3.4.1.min.js -->
    <script src="./dist/jquery-3.4.1.min.js"></script>
    <!-- https://raw.githubusercontent.com/apache/incubator-echarts/master/dist/extension/dataTool.min.js -->
    <script src="./dist/dataTool.min.js"></script>
</head>
<body>
    <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 1200px;height:800px;"></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')); //app.title = '力引导布局'; myChart.showLoading(); // http://echarts.baidu.com/gallery/data/asset/data/les-miserables.gexf // https://gephi.org/gexf/format/primer.html $.get('./data/les-miserables.gexf', function (xml) { myChart.hideLoading(); var graph = echarts.dataTool.gexf.parse(xml); var categories = []; for (var i = 0; i < 9; i++) { categories[i] = { name: '类目' + i }; } graph.nodes.forEach(function (node) { node.itemStyle = null; node.symbolSize = 10; node.value = node.symbolSize; node.category = node.attributes.modularity_class; // Use random x, y node.x = node.y = null; node.draggable = true; }); option = { title: { text: 'Les Miserables', subtext: 'Default layout', top: 'bottom', left: 'right' }, tooltip: { }, legend: [{ // selectedMode: 'single', data: categories.map(function (a) { return a.name; }) }], animation: false, series: [ { name: 'Les Miserables', type: 'graph', layout: 'force', data: graph.nodes, links: graph.links, categories: categories, roam: true, label: { normal: { position: 'right' } }, force: { repulsion: 100 } } ] }; myChart.setOption(option); }, 'xml'); </script>
</body>
</html>