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Project2OnlineVotingSystemSchoolofSoftware,ChengduPolytechnicLecturer:MuQichunTask19BasicUseofeChartsIntroductiontoeChartsWhencheckingthevehiclelistinthebackground,

administratorscanseethenumberofvotesforeachvehicle,butthisnumberisnotintuitive.Somepopularstatisticalmethodscanbeused,suchashistogramandlinechart,bywhichthenumberofvotesforvehicles

willbemoreintuitive

throughdatavisualization.Therearemanymethods

for

datavisualization,somefreeandsomepaid.Featuringwithpowerfulfunction,easy-to-use,informativedocumentationinChinese,whichisconvenienttoreadforus,eChartscomponentprovidedbyBaiduisrecommended.eCharts’sofficialwebsite：/zh/index.htmlIntroductiontoeChartsAsaJavaScript-baseddatavisualizationchartlibrary,EChartsprovidesdatavisualizationcharts,whichareintuitive,vivid,interactiveandcustomizable.OriginallyopensourcedbyBaiduteam,ECharts

wasdonatedtoApacheFoundationinearly2018,consequentlybecominganASFincubator-levelproject.OntheeveningofJanuary26,2021,theApacheFoundationofficiallyannouncedtheofficialgraduationoftheEChartsproject.OnJanuary28,theECharts5onlineconferencewasheld.EChartsprovidesconventionallinecharts,histograms,scattercharts,piecharts,K-linecharts,boxchartsforstatistics,maps,heatmaps,andlinechartsforgeographicdatavisualization.Italsoprovidesrelationshipdiagrams,treemaps,sunburstdiagramsforrelationaldatavisualization,parallelcoordinatesformultidimensionaldatavisualization,andfunneldiagramsanddashboardsforBI.Besides,itsupportsthemashupamongdiagrams.QuickStartObtainApacheEChartsTMinthefollowingways.DownloadfromtheApacheECharts’sofficialwebsite,thenbuilditafteracquiringtheofficialsourcepackage.Obtainitin

ECharts'GitHub.Obtainecharts,npminstallecharts--save

bynpm.Detailsin"Usingecharts

in

webpack".Introduce

to

CDNbyjsDelivrObtainECharts<!DOCTYPEhtml><html><head><metacharset="utf-8"><!--引入ECharts文件--><scriptsrc="echarts.min.js"></script></head></html>IntroductiontoEChartsQuickStartDrawasimplediagram<!DOCTYPEhtml><html><head><metacharset="utf-8"><title>ECharts</title><!--引入echarts.js--><scriptsrc="echarts.min.js"></script></head><body><!--為ECharts準(zhǔn)備一個(gè)具備大?。▽捀撸┑腄om--><divid="main"style="width:600px;height:400px;"></div><scripttype="text/javascript">//基于準(zhǔn)備好的dom，初始化echarts實(shí)例varmyChart=echarts.init(document.getElementById('main'));//指定圖表的配置項(xiàng)和數(shù)據(jù)varoption={title:{text:'ECharts入門(mén)示例'},tooltip:{},legend:{data:['銷(xiāo)量']},xAxis:{data:["襯衫","羊毛衫","雪紡衫","褲子","高跟鞋","襪子"]},yAxis:{},series:[{name:'銷(xiāo)量',type:'bar',data:[5,20,36,10,10,20]}]};//使用剛指定的配置項(xiàng)和數(shù)據(jù)顯示圖表。myChart.setOption(option);</script></body></html>SummaryInthiscourse,wehavelearnedthebasicknowledgeabout

eCharts,whichincludesthequickstartofeCh

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