• Echarts GL初次体验


       按照官方文档,第一次接触了Echarts GL,是一次很有趣的体验^_^,不过在官网上下载的echarts-gl.js和echarts.js版本兼容不好,时常会报一些错误。先看看我解决错误的方法(很lowO(∩_∩)O哈哈~)

      错误:

    Uncaught Error: echarts version is too old, needs 4.0.3 or higher
        at versionTooOldMsg (echarts-gl.js:28712)
        at checkVersion (echarts-gl.js:28718)
        at Object.__webpack_exports__.a (echarts-gl.js:28723)
        at __webpack_require__ (echarts-gl.js:30)
        at Object.<anonymous> (echarts-gl.js:28612)
        at __webpack_require__ (echarts-gl.js:30)
        at module.exports (echarts-gl.js:73)
        at echarts-gl.js:76
        at webpackUniversalModuleDefinition (echarts-gl.js:9)
        at echarts-gl.js:10
    versionTooOldMsg @ echarts-gl.js:28712
    checkVersion @ echarts-gl.js:28718
    __webpack_exports__.a @ echarts-gl.js:28723
    __webpack_require__ @ echarts-gl.js:30
    (anonymous) @ echarts-gl.js:28612
    __webpack_require__ @ echarts-gl.js:30
    module.exports @ echarts-gl.js:73
    (anonymous) @ echarts-gl.js:76
    webpackUniversalModuleDefinition @ echarts-gl.js:9
    (anonymous) @ echarts-gl.js:10

      解决方法:

    注释echarts-gl.js中报错的几行!!!

    还有好多类似的错误,我都直接注释-_-||

      下面是第一个例子的测试:

    <%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <base href="<%=basePath%>" />
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>EChartGL Test</title>
    <script type="text/javascript" src="js/echarts.js"></script>
    <script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
    <script type="text/javascript" src="js/echarts-gl.js"></script>
    </head>
    <body>
    <div id="main" style="800px;height:600px;"></div>
    <script type="text/javascript">
    function makeGaussian(amplitude, x0, y0, sigmaX, sigmaY) {
        return function (amplitude, x0, y0, sigmaX, sigmaY, x, y) {
            var exponent = -(
                    ( Math.pow(x - x0, 2) / (2 * Math.pow(sigmaX, 2)))
                    + ( Math.pow(y - y0, 2) / (2 * Math.pow(sigmaY, 2)))
                );
            return amplitude * Math.pow(Math.E, exponent);
        }.bind(null, amplitude, x0, y0, sigmaX, sigmaY);
    }
    // 创建一个高斯分布函数
    var gaussian = makeGaussian(50, 0, 0, 20, 20);
    
    var data = [];
    for (var i = 0; i < 1000; i++) {
        // x, y 随机分布
        var x = Math.random() * 100 - 50;
        var y = Math.random() * 100 - 50;
        var z = gaussian(x, y);
        data.push([x, y, z]);
    }
    //基于准备好的dom,初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'),'light');
    var option = {
            // 需要注意的是我们不能跟 grid 一样省略 grid3D
            grid3D: {},
            // 默认情况下, x, y, z 分别是从 0 到 1 的数值轴
            xAxis3D: {},
            yAxis3D: {},
            zAxis3D: {max: 100 },
            series: [{
                type: 'scatter3D',
                data: data
            }]
        }
    myChart.setOption(option);
    </script>
    
    </body>
    </html>

      效果图:

     

      使用真实数据的三维散点图:

    从 http://www.echartsjs.com/examples/data/asset/data/life-expectancy-table.json 获取这份数据。

    <%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <base href="<%=basePath%>" />
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>EChartGL Test</title>
    <script type="text/javascript" src="js/echarts.js"></script>
    <script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
    <script type="text/javascript" src="js/echarts-gl.js"></script>
    </head>
    <body>
    <div id="main" style="800px;height:600px;"></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'),'light');
    $.get('asset/life-expectancy-table.json', function (data) {
        myChart.setOption({
            grid3D: {},
            xAxis3D: {},
            yAxis3D: {},
            zAxis3D: {},
            dataset: {
                source: data
            },
            series: [
                {
                    type: 'scatter3D',
                    symbolSize: 2.5
                }
            ]
        })
    });
    </script>
    
    </body>
    </html>

      效果如下:

    默认会把前三列,也就是Income,Life Expectancy,Population分别放到 x、 y、 z 轴上。

    使用 encode 属性我们还可以将指定列的数据映射到指定的坐标轴上,从而省去很多繁琐的数据转换代码。

      还有几个例子,如果有兴趣可以看看官方文档:http://echarts.baidu.com/tutorial.html

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  • 原文地址:https://www.cnblogs.com/wsyblog/p/8544283.html
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