寮步网页设计,长沙百度seo,建立网页的几个步骤,wordpress发表的文章在页面找不到echarts
ECharts 是一个使用 JavaScript 实现的开源可视化库#xff0c;主要用于数据的可视化展示。ECharts 支持丰富的图表类型#xff0c;如折线图、柱状图、饼图、地图、K线图等#xff0c;可以满足不同类型数据的展示需求。
文档地址#xff1a;echarts
本次所绘制三…echarts
ECharts 是一个使用 JavaScript 实现的开源可视化库主要用于数据的可视化展示。ECharts 支持丰富的图表类型如折线图、柱状图、饼图、地图、K线图等可以满足不同类型数据的展示需求。
文档地址echarts
本次所绘制三维柱状图主要使用的是示例源代码在此基础上做了些修改。
引入CDN
使用echarts需要导入echarts和echarts-gl。
免费的CDN服务可访问网址Staticfile CDN
!-- 引入 ECharts 文件 --
script srchttps://cdn.jsdelivr.net/npm/echartslatest/dist/echarts.min.js/script
script srchttps://cdn.staticfile.net/echarts-gl/2.0.8/echarts-gl.js/scriptHTML结构
设置一个container容器存放三维柱状图设置一个下载png图片按钮。根据id选择器设置样式。
!DOCTYPE html
html lang
headmeta charsetutf-8titleECharts/title!-- 引入 ECharts 文件 --script srchttps://cdn.jsdelivr.net/npm/echartslatest/dist/echarts.min.js/scriptscript srchttps://cdn.staticfile.net/echarts-gl/2.0.8/echarts-gl.js/scriptstyle#container {width: 900px;height: 800px;margin-left: 300px;margin-top: -120px;}#download{margin-left: 300px;}/style
/head
body
!-- 准备一个 DOM 容器 --
div idcontainer/div
button iddownloadDownload as PNG/button
script typetext/javascript...
/body
/htmlecharts属性设置
visualMap组件可以根据Z轴值的大小映射出不同的颜色。graphic组件可以添加文字说明。
const dom document.getElementById(container);const myChart echarts.init(dom, null, {renderer: canvas,useDirtyRect: false});let option;// prettier-ignoreconst hours [12a, 1a, 2a, 3a, 4a, 5a, 6a,7a, 8a, 9a, 10a, 11a,12p, 1p, 2p, 3p, 4p, 5p,6p, 7p, 8p, 9p, 10p, 11p];// prettier-ignoreconst days [Saturday, Friday, Thursday,Wednesday, Tuesday, Monday, Sunday];// prettier-ignoreconst data [[0, 0, 5], [0, 1, 1], [0, 2, 0], [0, 3, 0], [0, 4, 0], [0, 5, 0], [0, 6, 0], [0, 7, 0], [0, 8, 0], [0, 9, 0], [0, 10, 0], [0, 11, 2], [0, 12, 4], [0, 13, 1], [0, 14, 1], [0, 15, 3], [0, 16, 4], [0, 17, 6], [0, 18, 4], [0, 19, 4], [0, 20, 3], [0, 21, 3], [0, 22, 2], [0, 23, 5], [1, 0, 7], [1, 1, 0], [1, 2, 0], [1, 3, 0], [1, 4, 0], [1, 5, 0], [1, 6, 0], [1, 7, 0], [1, 8, 0], [1, 9, 0], [1, 10, 5], [1, 11, 2], [1, 12, 2], [1, 13, 6], [1, 14, 9], [1, 15, 11], [1, 16, 6], [1, 17, 7], [1, 18, 8], [1, 19, 12], [1, 20, 5], [1, 21, 5], [1, 22, 7], [1, 23, 2], [2, 0, 1], [2, 1, 1], [2, 2, 0], [2, 3, 0], [2, 4, 0], [2, 5, 0], [2, 6, 0], [2, 7, 0], [2, 8, 0], [2, 9, 0], [2, 10, 3], [2, 11, 2], [2, 12, 1], [2, 13, 9], [2, 14, 8], [2, 15, 10], [2, 16, 6], [2, 17, 5], [2, 18, 5], [2, 19, 5], [2, 20, 7], [2, 21, 4], [2, 22, 2], [2, 23, 4], [3, 0, 7], [3, 1, 3], [3, 2, 0], [3, 3, 0], [3, 4, 0], [3, 5, 0], [3, 6, 0], [3, 7, 0], [3, 8, 1], [3, 9, 0], [3, 10, 5], [3, 11, 4], [3, 12, 7], [3, 13, 14], [3, 14, 13], [3, 15, 12], [3, 16, 9], [3, 17, 5], [3, 18, 5], [3, 19, 10], [3, 20, 6], [3, 21, 4], [3, 22, 4], [3, 23, 1], [4, 0, 1], [4, 1, 3], [4, 2, 0], [4, 3, 0], [4, 4, 0], [4, 5, 1], [4, 6, 0], [4, 7, 0], [4, 8, 0], [4, 9, 2], [4, 10, 4], [4, 11, 4], [4, 12, 2], [4, 13, 4], [4, 14, 4], [4, 15, 14], [4, 16, 12], [4, 17, 1], [4, 18, 8], [4, 19, 5], [4, 20, 3], [4, 21, 7], [4, 22, 3], [4, 23, 0], [5, 0, 2], [5, 1, 1], [5, 2, 0], [5, 3, 3], [5, 4, 0], [5, 5, 0], [5, 6, 0], [5, 7, 0], [5, 8, 2], [5, 9, 0], [5, 10, 4], [5, 11, 1], [5, 12, 5], [5, 13, 10], [5, 14, 5], [5, 15, 7], [5, 16, 11], [5, 17, 6], [5, 18, 0], [5, 19, 5], [5, 20, 3], [5, 21, 4], [5, 22, 2], [5, 23, 0], [6, 0, 1], [6, 1, 0], [6, 2, 0], [6, 3, 0], [6, 4, 0], [6, 5, 0], [6, 6, 0], [6, 7, 0], [6, 8, 0], [6, 9, 0], [6, 10, 1], [6, 11, 0], [6, 12, 2], [6, 13, 1], [6, 14, 3], [6, 15, 4], [6, 16, 0], [6, 17, 0], [6, 18, 0], [6, 19, 0], [6, 20, 1], [6, 21, 2], [6, 22, 2], [6, 23, 6]];option {tooltip: {},// visualMap组件根据Z轴值的大小映射不同的颜色visualMap: {min: 0,max: 20,text: [20, 0],bottom: 10%,inRange: {color: [#313695,#4575b4,#74add1,#abd9e9,#e0f3f8,#ffffbf,#fee090,#fdae61,#f46d43,#d73027,#a50026]}},// graphic组件添加说明文本graphic: [{type: text,left: 5%,bottom: 21%,style: {text: value,fill: #000,font: 14px Microsoft YaHei}}],xAxis3D: {type: category,data: hours,name: test1},yAxis3D: {type: category,data: days,name: test2,nameGap: 25, // 设置Y轴名称与轴线之间的距离单位是像素axisLabel: {// 设置标注与轴线之间的间距margin: 5 // 这里的20可以根据需要调整为其他值}},zAxis3D: {type: value,name: test3},grid3D: {boxWidth: 200,boxDepth: 80,viewControl: {// projection: orthographic},light: {main: {intensity: 1.2,shadow: true},ambient: {intensity: 0.3}}},series: [{type: bar3D,data: data.map(function (item) {return {value: [item[1], item[0], item[2]]};}),shading: lambert,label: {fontSize: 16,borderWidth: 1},emphasis: {label: {fontSize: 20,color: #900},itemStyle: {color: #900}}}]};
if (option typeof option object) {myChart.setOption(option);}window.addEventListener(resize, myChart.resize);添加下载事件
通过添加下载事件可以将HTML中的图片转换成png格式。
// 添加下载事件
document.getElementById(download).addEventListener(click, function() {// 使用echarts的getDataURL方法获取图表的Base64编码const url myChart.getDataURL({type: png,pixelRatio: 2, // 设置图像的分辨率backgroundColor: #fff // 设置背景色可选});// 创建一个下载链接const a document.createElement(a);a.href url;a.download chart.png;document.body.appendChild(a);a.click();document.body.removeChild(a);
});完整代码
!DOCTYPE html
html lang
headmeta charsetutf-8titleECharts/title!-- 引入 ECharts 文件 --script srchttps://cdn.jsdelivr.net/npm/echartslatest/dist/echarts.min.js/scriptscript srchttps://cdn.staticfile.net/echarts-gl/2.0.8/echarts-gl.js/scriptstyle#container {width: 900px;height: 800px;margin-left: 300px;margin-top: -120px;}#download{margin-left: 300px;}/style
/head
body
!-- 准备一个 DOM 容器 --
div idcontainer/div
button iddownloadDownload as PNG/button
script typetext/javascriptconst dom document.getElementById(container);const myChart echarts.init(dom, null, {renderer: canvas,useDirtyRect: false});let option;// prettier-ignoreconst hours [12a, 1a, 2a, 3a, 4a, 5a, 6a,7a, 8a, 9a, 10a, 11a,12p, 1p, 2p, 3p, 4p, 5p,6p, 7p, 8p, 9p, 10p, 11p];// prettier-ignoreconst days [Saturday, Friday, Thursday,Wednesday, Tuesday, Monday, Sunday];// prettier-ignoreconst data [[0, 0, 5], [0, 1, 1], [0, 2, 0], [0, 3, 0], [0, 4, 0], [0, 5, 0], [0, 6, 0], [0, 7, 0], [0, 8, 0], [0, 9, 0], [0, 10, 0], [0, 11, 2], [0, 12, 4], [0, 13, 1], [0, 14, 1], [0, 15, 3], [0, 16, 4], [0, 17, 6], [0, 18, 4], [0, 19, 4], [0, 20, 3], [0, 21, 3], [0, 22, 2], [0, 23, 5], [1, 0, 7], [1, 1, 0], [1, 2, 0], [1, 3, 0], [1, 4, 0], [1, 5, 0], [1, 6, 0], [1, 7, 0], [1, 8, 0], [1, 9, 0], [1, 10, 5], [1, 11, 2], [1, 12, 2], [1, 13, 6], [1, 14, 9], [1, 15, 11], [1, 16, 6], [1, 17, 7], [1, 18, 8], [1, 19, 12], [1, 20, 5], [1, 21, 5], [1, 22, 7], [1, 23, 2], [2, 0, 1], [2, 1, 1], [2, 2, 0], [2, 3, 0], [2, 4, 0], [2, 5, 0], [2, 6, 0], [2, 7, 0], [2, 8, 0], [2, 9, 0], [2, 10, 3], [2, 11, 2], [2, 12, 1], [2, 13, 9], [2, 14, 8], [2, 15, 10], [2, 16, 6], [2, 17, 5], [2, 18, 5], [2, 19, 5], [2, 20, 7], [2, 21, 4], [2, 22, 2], [2, 23, 4], [3, 0, 7], [3, 1, 3], [3, 2, 0], [3, 3, 0], [3, 4, 0], [3, 5, 0], [3, 6, 0], [3, 7, 0], [3, 8, 1], [3, 9, 0], [3, 10, 5], [3, 11, 4], [3, 12, 7], [3, 13, 14], [3, 14, 13], [3, 15, 12], [3, 16, 9], [3, 17, 5], [3, 18, 5], [3, 19, 10], [3, 20, 6], [3, 21, 4], [3, 22, 4], [3, 23, 1], [4, 0, 1], [4, 1, 3], [4, 2, 0], [4, 3, 0], [4, 4, 0], [4, 5, 1], [4, 6, 0], [4, 7, 0], [4, 8, 0], [4, 9, 2], [4, 10, 4], [4, 11, 4], [4, 12, 2], [4, 13, 4], [4, 14, 4], [4, 15, 14], [4, 16, 12], [4, 17, 1], [4, 18, 8], [4, 19, 5], [4, 20, 3], [4, 21, 7], [4, 22, 3], [4, 23, 0], [5, 0, 2], [5, 1, 1], [5, 2, 0], [5, 3, 3], [5, 4, 0], [5, 5, 0], [5, 6, 0], [5, 7, 0], [5, 8, 2], [5, 9, 0], [5, 10, 4], [5, 11, 1], [5, 12, 5], [5, 13, 10], [5, 14, 5], [5, 15, 7], [5, 16, 11], [5, 17, 6], [5, 18, 0], [5, 19, 5], [5, 20, 3], [5, 21, 4], [5, 22, 2], [5, 23, 0], [6, 0, 1], [6, 1, 0], [6, 2, 0], [6, 3, 0], [6, 4, 0], [6, 5, 0], [6, 6, 0], [6, 7, 0], [6, 8, 0], [6, 9, 0], [6, 10, 1], [6, 11, 0], [6, 12, 2], [6, 13, 1], [6, 14, 3], [6, 15, 4], [6, 16, 0], [6, 17, 0], [6, 18, 0], [6, 19, 0], [6, 20, 1], [6, 21, 2], [6, 22, 2], [6, 23, 6]];option {tooltip: {},// visualMap组件根据Z轴值的大小映射不同的颜色visualMap: {min: 0,max: 20,text: [20, 0],bottom: 10%,inRange: {color: [#313695,#4575b4,#74add1,#abd9e9,#e0f3f8,#ffffbf,#fee090,#fdae61,#f46d43,#d73027,#a50026]}},// graphic组件添加说明文本graphic: [{type: text,left: 5%,bottom: 21%,style: {text: value,fill: #000,font: 14px Microsoft YaHei}}],xAxis3D: {type: category,data: hours,name: test1},yAxis3D: {type: category,data: days,name: test2,nameGap: 25, // 设置Y轴名称与轴线之间的距离单位是像素axisLabel: {// 设置标注与轴线之间的间距margin: 5 // 这里的20可以根据需要调整为其他值}},zAxis3D: {type: value,name: test3},grid3D: {boxWidth: 200,boxDepth: 80,viewControl: {// projection: orthographic},light: {main: {intensity: 1.2,shadow: true},ambient: {intensity: 0.3}}},series: [{type: bar3D,data: data.map(function (item) {return {value: [item[1], item[0], item[2]]};}),shading: lambert,label: {fontSize: 16,borderWidth: 1},emphasis: {label: {fontSize: 20,color: #900},itemStyle: {color: #900}}}]};// 添加下载事件document.getElementById(download).addEventListener(click, function() {// 使用echarts的getDataURL方法获取图表的Base64编码const url myChart.getDataURL({type: png,pixelRatio: 2, // 设置图像的分辨率backgroundColor: #fff // 设置背景色可选});// 创建一个下载链接const a document.createElement(a);a.href url;a.download chart.png;document.body.appendChild(a);a.click();document.body.removeChild(a);});if (option typeof option object) {myChart.setOption(option);}window.addEventListener(resize, myChart.resize);
/script
/body
/html
结果展示
点击下载按钮即可保存为png格式。
