建设网站费用明细,快速做网站联系电话,怎么介绍自己的网站建设,网站建设实例分析echarts#xff1a;一个基于 JavaScript 的开源可视化图表库。 目录 效果
一、介绍 1、官方文档#xff1a;Apache ECharts
2、官方示例
二、准备工作
1、安装依赖包 2、示例版本
三、使用步骤
1、在单页面引入 echarts
2、指定容器并设置容器宽高
3、数据处理一个基于 JavaScript 的开源可视化图表库。 目录 效果
一、介绍 1、官方文档Apache ECharts
2、官方示例
二、准备工作
1、安装依赖包 2、示例版本
三、使用步骤
1、在单页面引入 echarts
2、指定容器并设置容器宽高
3、数据处理关键点
四、完整示例
tips 效果 一、介绍 1、官方文档Apache ECharts
Apache EChartsApache ECharts一款基于JavaScript的数据可视化图表库提供直观生动可交互可个性化定制的数据可视化图表。https://echarts.apache.org/zh/index.html
2、官方示例 二、准备工作
1、安装依赖包
npm install echarts --save 2、示例版本
echarts: ^5.4.2, 三、使用步骤
1、在单页面引入 echarts
import * as echarts from echarts;
注上面的代码会引入 ECharts 中所有的图表和组件如果你不想引入所有组件也可以使用 ECharts 提供的按需引入的接口来打包必须的组件。详见官方文档在项目中引入 ECharts - 入门篇 - Handbook - Apache ECharts
2、指定容器并设置容器宽高
templatediv idmain/div
/templatescriptimport * as echarts from echarts;export default {name: mutiYAxis,data() {return {};},methods: {initChart() {let data this.datalet chartDom document.getElementById(main);let myChart echarts.init(chartDom);let option;...详见完整示例 },},};
/scriptstyle scoped#main {width: 1000px;height: 500px;}
/style
3、数据处理关键点 let xAxisData [];let series [];let index 1;let seriesNames [];let seriesUnit [];let yAxis [];let timeData [];data.sort(this.sortByLength);data.forEach((_series, i) {let _yAxis [];let arrEle [];let nameUnit ;_series.unit ? (nameUnit ( _series.unit )) : (nameUnit );_series.dataList.forEach((item) {let { value, time } item;timeData.push(time);arrEle [time, value];_yAxis.push(arrEle);});seriesNames.push(_series.seriesName);seriesUnit.push(_series.unit);if (yAxis.length 2) {yAxis.push({name: _series.seriesName nameUnit,nameTextStyle: {fontSize: 14,fontcolor: #fff,fontWeight: bolder,},splitLine: {show: false},axisLabel: {formatter: {value} ,},});}let _item {name: _series.seriesName,type: line,smooth: true,showAllSymbol: false,symbol: emptyCircle,data: _yAxis,connectNulls: true,};if (index 2) {_item.yAxisIndex 1;}series.push(_item);index;});xAxisData this.sortByTime(timeData);
注部分方法的完整版在完整示例展示 四、完整示例
templatediv classmultipleDiscountingdiv idmain/div/div
/template
script
import * as echarts from echarts;
export default {name: multipleDiscounting,data() {return {dataArr: [{seriesName: 折现一,unit: ,dataList: [{value: 0,time: 2023-12-05 01:32:00},{value: 0,time: 2023-12-05 02:06:50},{value: 0,time: 2023-12-05 07:13:56},{value: 11.5,time: 2023-12-05 07:56:06},{value: 36.3,time: 2023-12-05 10:18:12},{value: 51.8,time: 2023-12-05 12:34:49},{value: 21.9,time: 2023-12-05 14:36:05},{value: 24.2,time: 2023-12-05 15:40:00},{value: 13.7,time: 2023-12-05 16:36:22},{value: 0,time: 2023-12-05 17:14:31},],},{seriesName: 折现二,unit: ,dataList: [{value: 0,time: 2023-12-05 00:28:16},{value: 0,time: 2023-12-05 00:31:56},{value: 0,time: 2023-12-05 02:10:56},{value: 0,time: 2023-12-05 02:21:56},{value: 0,time: 2023-12-05 06:50:22},{value: 36.6,time: 2023-12-05 10:39:55},{value: 34.1,time: 2023-12-05 10:50:55},{value: 50.2,time: 2023-12-05 12:00:36},{value: 25.9,time: 2023-12-05 14:36:05},{value: 22.1,time: 2023-12-05 14:37:33},{value: 24.9,time: 2023-12-05 15:50:10},{value: 12.1,time: 2023-12-05 16:56:11},{value: 9.3,time: 2023-12-05 17:15:59}],},]};},mounted() {this.$nextTick(() {this.initChart(this.dataArr);});},methods: {initChart(data) {let chartDom document.getElementById(main);let myChart echarts.init(chartDom);let option;let xAxisData [];let series [];let index 1;let seriesNames [];let seriesUnit [];let yAxis [];let timeData [];data.sort(this.sortByLength);data.forEach((_series, i) {let _yAxis [];let arrEle [];let nameUnit ;_series.unit ? (nameUnit ( _series.unit )) : (nameUnit );_series.dataList.forEach((item) {let { value, time } item;timeData.push(time);arrEle [time, value];_yAxis.push(arrEle);});seriesNames.push(_series.seriesName);seriesUnit.push(_series.unit);if (yAxis.length 2) {yAxis.push({name: _series.seriesName nameUnit,nameTextStyle: {fontSize: 14,fontcolor: #fff,fontWeight: bolder,},splitLine: {show: false},axisLabel: {formatter: {value} ,},});}let _item {name: _series.seriesName,type: line,smooth: true,showAllSymbol: false,symbol: emptyCircle,data: _yAxis,connectNulls: true,};if (index 2) {_item.yAxisIndex 1;}series.push(_item);index;});xAxisData this.sortByTime(timeData);option {grid: {containLabel: true,},tooltip: {trigger: axis,borderRadius: 4,formatter: function (params) {let result params[0].axisValueLabel;let unit ;for (let i 0; i params.length; i) {seriesUnit[i] ? (unit seriesUnit[i]) : (unit );let param params[i];result br/ param.marker param.seriesName param.value unit;}return result;},},legend: {type: scroll,width: 90%,data: seriesNames,},calculable: true,xAxis: [{type: category,boundaryGap: false,data: xAxisData,},],yAxis,dataZoom: [{type: inside,},],series,};option myChart.setOption(option);},// 根据 dataList.length 从大到小排序sortByLength(a, b) {return b.dataList.length - a.dataList.length;},// 根据 日期时间 去重 从小到大排序sortByTime(arr) {return [...new Set(arr)].map((item) new Date(item)).sort((a, b) a.getTime() - b.getTime()).map((time) this.timeFormatConversion(time));},// 时间格式转换timeFormatConversion(chinaStandard) {let date new Date(chinaStandard);let Y date.getFullYear();let M (date.getMonth() 1).toString().padStart(2, 0);let D date.getDate().toString().padStart(2, 0);let h date.getHours().toString().padStart(2, 0);let m date.getMinutes().toString().padStart(2, 0);let s date.getSeconds().toString().padStart(2, 0);return ${Y}-${M}-${D} ${h}:${m}:${s};},},
};
/scriptstyle langless scoped
#main {width: 1000px;height: 500px;
}
/styletips
1、X轴的数据一定要合并去重并排序
2、series的数据格式一定是数组嵌套数组
