G2 基本使用 折线图 柱状图 饼图 基本配置
G2的基本使用
1.浏览器引入 <!-- 引入在线资源 --> <script src="https://gw.alipayobjects.com/os/lib/antv/g2/3.4.10/dist/g2.min.js"></script>
2.通过 npm 安装 npm install @antv/g2 --save
3.创建 div
图表容器 <div id="c1"></div>
4. 编写图表绘制代码
(1)创建 Chart 图表对象,指定图表所在的容器 ID、指定图表的宽高、边距等信息;
(2)载入图表数据源;
(3)使用图形语法进行图表的绘制;
(4)渲染图表。(这部分代码用 <script></script>
,可以放在页面代码的任意位置(最好的做法是放在 </body>
之前))
5示例:
(1)折线图(单线)
<body> <div id="appearance"></div> <script> var data = [{year: '1991', value: 3}, {year: '1992', value: 4}, {year: '1993', value: 3.5}, { // 数据格式 year: '1994', value: 5}, {year: '1995', value: 4.9}, {year: '1996', value: 6}, {year: '1997', value: 7}, {year: '1998', value: 9}, {year: '1999', value: 13}]; var chart = new G2.Chart({ container: 'appearance', // 指定 图表容器ID forceFit: true, // 是否自动缩放 height: 500, // 图表的高度 }); chart.source(data); // 载入数据源 chart.scale('value', { // 度量 min: 0 // Y轴显示的最小值 }); chart.scale('year', { // 度量 range: [0, 1] // 数值范围区间 }); chart.tooltip({ // 提示信息 crosshairs: { type: 'line' // 提示信息类型 } }); chart.line().position('year*value'); // 几何标记类型 线, position:二维坐标系内设至 x轴 y轴 chart.point().position('year*value').size(4).shape('circle').style({ // 几何标记类型 点, 二维坐标系内设置 x轴 y轴 大小 图形形状 stroke: '#fff', lineWidth: 1 }); chart.render(); // 渲染 </script> </body>
(2)折线图(双线)
<div id="appearance"></div> <script> // 在一行中保存多个城市的数据,需要将数据转换成 // {month: 'Jan', city: 'Tokyo', temperature: 3.9} var data = [{month: 'Jan', Tokyo: 7.0, London: 3.9}, {month: 'Feb', Tokyo: 6.9, London: 4.2}, { month: 'Mar', Tokyo: 9.5, London: 5.7}, {month: 'Apr', Tokyo: 14.5, London: 8.5}, {month: 'May', Tokyo: 18.4, London: 11.9}, {month: 'Jun', Tokyo: 21.5, London: 15.2}, {month: 'Jul', Tokyo: 25.2, London: 17.0}, {month: 'Aug', Tokyo: 26.5, London: 16.6}, {month: 'Sep', Tokyo: 23.3, London: 14.2 }, {month: 'Oct', Tokyo: 18.3, London: 10.3}, {month: 'Nov', Tokyo: 13.9, London: 6.6}, {month: 'Dec', Tokyo: 9.6, London: 4.8}]; var ds = new DataSet(); // 创建DataSet 对象 var dv = ds.createView().source(data);// 创建数据实例 // fold 方式完成了行列转换,如果不想使用 DataSet 直接手工转换数据即可 dv.transform({ type: 'fold', fields: ['Tokyo', 'London'], // 展开字段集 key: 'city', // key字段 value: 'temperature' // value字段 }); var chart = new G2.Chart({ container: 'appearance', forceFit: true, height: 500 }); chart.source(dv, { month: { range: [0, 1] } }); chart.tooltip({ crosshairs: { type: 'line' } }); chart.axis('temperature', { label: { formatter: function formatter(val) { // 格式化 return val + '°C'; } } }); chart.line().position('month*temperature').color('city').shape('smooth'); chart.point().position('month*temperature').color('city').size(4).shape('circle').style({ stroke: '#fff', lineWidth: 1 }); chart.render(); </script>
(3)折线图(多线)
<script> var data = [{date: '2018/8/1', type: 'download', value: 4623}, {date: '2018/8/1', type: 'register', value: 2208}, { date: '2018/8/1', type: 'bill', value: 182}, {date: '2018/8/2', type: 'download', value: 6145}, {date: '2018/8/2', type: 'register', value: 2016}, {date: '2018/8/2', type: 'bill', value: 257}, {date: '2018/8/3', type: 'download', value: 508}, {date: '2018/8/3', type: 'register', value: 2916}, {date: '2018/8/3', type: 'bill', value: 289}, { date: '2018/8/4', type: 'download', value: 6268}, {date: '2018/8/4', type: 'register', value: 4512}, {date: '2018/8/4', type: 'bill', value: 428}, {date: '2018/8/5', type: 'download', value: 6411}, {date: '2018/8/5', type: 'register', value: 8281}, {date: '2018/8/5', type: 'bill', value: 619}, {date: '2018/8/6', type: 'download', value: 1890}, { date: '2018/8/6', type: 'register', value: 2008}, {date: '2018/8/6', type: 'bill', value: 87}, {date: '2018/8/7', type: 'download', value: 4251}, {date: '2018/8/7', type: 'register', value: 1963}, {date: '2018/8/7', type: 'bill', value: 706}, {date: '2018/8/8', type: 'download', value: 2978}, {date: '2018/8/8', type: 'register', value: 2367}, { date: '2018/8/8', type: 'bill', value: 387}, {date: '2018/8/9', type: 'download', value: 3880}, {date: '2018/8/9', type: 'register', value: 2956}, {date: '2018/8/9', type: 'bill', value: 488}, {date: '2018/8/10', type: 'download', value: 3606}, {date: '2018/8/10', type: 'register', value: 678}, {date: '2018/8/10', type: 'bill', value: 507}, { date: '2018/8/11', type: 'download', value: 4311}, {date: '2018/8/11', type: 'register', value: 3188}, {date: '2018/8/11', type: 'bill', value: 548}, {date: '2018/8/12', type: 'download', value: 4116}, {date: '2018/8/12', type: 'register', value: 3491}, {date: '2018/8/12', type: 'bill', value: 456}, {date: '2018/8/13', type: 'download', value: 6419}, { date: '2018/8/13', type: 'register', value: 2852}, {date: '2018/8/13', type: 'bill', value: 689}, {date: '2018/8/14', type: 'download', value: 1643}, {date: '2018/8/14', type: 'register', value: 4788}, {date: '2018/8/14', type: 'bill', value: 280}, {date: '2018/8/15', type: 'download', value: 445}, {date: '2018/8/15', type: 'register', value: 4319}, { date: '2018/8/15', type: 'bill', value: 176}]; var chart = new G2.Chart({ container: 'appearance', forceFit: true, height: 500, padding: [100, 20, 30, 45] // 上右下左 }); chart.source(data); chart.tooltip({// 提示信息 follow: true, crosshairs: 'y', }); chart.source(data, { 'date': {// 显示的条数 tickCount: 15 } }); chart.axis('date', {// 坐标轴 label: { textStyle: { fill: '#aaaaaa' } } }); chart.axis('value', { label: { textStyle: { fill: '#aaaaaa' }, formatter: function formatter(text) {// 格式化参数值 return text.replace(/(\d)(?=(?:\d{3})+$)/g, '$1,'); } } }); chart.legend(false);// 图例禁用 chart.line().position('date*value').color('type'); chart.render(); </script>
(4)基础柱状图
<div id="appearance"></div> <script> var data = [{year: '1951 年', sales: 38}, {year: '1952 年', sales: 52}, {year: '1956 年', sales: 61}, {year: '1957 年', sales: 145}, {year: '1958 年', sales: 48}, {year: '1959 年', sales: 38}, {year: '1960 年', sales: 38}, {year: '1962 年', sales: 38}]; var chart = new G2.Chart({ container: 'appearance', forceFit: true, height: window.innerHeight }); chart.source(data); chart.scale('sales', { tickInterval: 20 // 用于指定坐标轴各个标度点的距离 }); chart.interval().position('year*sales'); chart.render(); </script>