资源描述：
《R语言导入导出数据.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、第七讲导入导出数据导入数据read.table()scan()read.table(file,header=FALSE,sep="",quote=""'",dec=".",row.names,col.names,as.is=FALSE,na.strings="NA",colClasses=NA,nrows=-1,skip=0,check.names=TRUE,fill=!blank.lines.skip,strip.white=FALSE,blank.lines.skip=TRUE,comment.char="#")team,name,level,workti
2、me,bounsbatch,SuNan,B,135,"9,818"batch,ChenQi,E,121,"6,050"batch,JiangXu,F,97,"4,189"online,ZhouXi,F,63,online,ChenHe,H,36,"1,064"例子：TeamInfo.csv>read.table("D:/work/TeamInfo.csv",header=TRUE,sep=",")->TeamInfo>TeamInfoteamnamelevelworktimebouns1batchSuNanB1359,8182batchChenQiE1216,0
3、503batchJiangXuF974,1894onlineZhouXiF635onlineChenHeH361,064file:“”,文件名的绝对路径，或工作目录下的文件>setwd("D:/work")>getwd()[1]"D:/work">read.table("TeamInfo.csv",header=TRUE,sep=",")->TeamInfohead：TRUE，第一行为数据名；FALSE（缺省），第一行被命名为V1,V2,…>read.table("D:/work/TeamInfo.csv",header=FALSE,sep=",")->Team
4、Info>TeamInfoV1V2V3V4V51teamnamelevelworktimebouns2batchSuNanB1359,8183batchChenQiE1216,0504batchJiangXuF974,1895onlineZhouXiF636onlineChenHeH361,064>read.table("D:/work/TeamInfo.csv",header=TRUE,sep="")->TeamInfo>TeamInfoteam.name.level.worktime.bouns1batch,SuNan,B,135,9,8182batch,C
5、henQi,E,121,6,0503batch,JiangXu,F,97,4,1894online,ZhouXi,F,63,5online,ChenHe,H,36,1,064sep:字段分割符号“”任意空格“,”逗号分割cammoseperatedvalues“t”tabnrows=-1：可读取的最大行数skip=0：跳过的行数>read.table("D:/work/TeamInfo.csv",header=TRUE,sep=",",nrows=3,skip=0)->TeamInfo>TeamInfoteamnamelevelworktimebouns1ba
6、tchSuNanB1359,8182batchChenQiE1216,0503batchJiangXuF974,189>read.table("D:/work/TeamInfo.csv",header=TRUE,sep=",",nrows=3,skip=2)->TeamInfo>TeamInfobatchChenQiEX121X6.0501batchJiangXuF974,1892onlineZhouXiF633onlineChenHeH361,064read.table的几个变种因为使用了不同的缺省值可以用在几种不同情况下：read.csv(file,head
7、er=TRUE,sep=",",quote=""",dec=".",fill=TRUE,...)read.csv2(file,header=TRUE,sep=";",quote=""",dec=",",fill=TRUE,...)read.delim(file,header=TRUE,sep="t",quote=""",dec=".",fill=TRUE,...)read.delim2(file,header=TRUE,sep="t",quote=""",dec=",",fill=TRUE,...)内建数据集的存取data()#获得基本系统提供的数据
8、集列表data(cars
