上機語言入門及繪圖實例

練R練1安裝R從/home/training/tools/R/1安裝R從/home/training/tools/R/R1安裝RWindows CRAN:RBinaries>windows>baseR-3.0.1-win.exe1安裝RMac CRAN:RBinaries>macosxR-3.0.1.pkg光標等待輸菜單欄光標等待輸控制臺R(Windows版路徑：開始所有程序>RRGuiFileRGui的EditRGui的PackagesRGui的Help2.安裝程序包從/home/training/tools/R/packages/2.安裝程序包從/home/training/tools/R/packages/ 2.安裝程序包用函數(shù)install.packages()， 例如：要安裝veganinstall.packages("安裝本地zipPackages>installpackagesfromlocal選擇本地磁盤 2.安裝程序包veganRR2.安裝程序包2.安裝程序包veganpermute程序包install.packages("permute")veganinstall.packages("vegan")3調用程序包輸入3調用程序包 和t檢1boxplotboxplot查看最后的 boxplot(count="lightgray")spray,dataInsectSprays,col參數(shù)更改boxplot(countspray,dataInsectSprays,col="red",xlab="spray",ylab="counts")boxplotboxplot(count~spray,data=InsectSprays,col="lightgray")boxplot(count~spray,data=InsectSprays,col="red",xlab="spray",ylab="counts")2賦值與注釋2+a<-<-也可用b<-c<-c3數(shù)據(jù)和t檢驗3數(shù)據(jù)和t檢驗22.51123456身高3數(shù)據(jù)和3數(shù)據(jù)和t檢驗第>height<-c(1.75,1.80,1.65,1.74,>weight<-c(60,72,57,90,95,t.test(ratio,3數(shù)據(jù)3數(shù)據(jù)和t檢驗3數(shù) 和t檢 1步將Excel.txt格式（制表符間隔）或.csv格式。數(shù)據(jù)讀入R工作空間，并賦值給一個對象。3數(shù)據(jù)和t檢驗將表1中的數(shù)據(jù)錄入Excel中，另存為t.test.txt3數(shù)據(jù)和t檢驗將表1中的數(shù)據(jù)錄入Excel中，另存為t.test.txt用readtableheader=TRUE)對變量ttestdataattach(t.test.data)ratio<-weight/height^t.test(ratio,mu=22.53數(shù)據(jù)3數(shù)據(jù)和t檢 Exceltxt4創(chuàng)建一個2到50的向量vector12,4,6,8,...,48,50vector1<-seq(from=2,to=50,選取vector1中的第20vector1[選取vector1中的第101520選取vector1中的第1020vector1[選取vector1中值大于40vector1[1舉例數(shù)據(jù)表 %2#Rrate<-c(20,22,24,26,28,30,32,34,36,38,40,42)impurity<-c(8.4,9.5,11.8,10.4,13.3,14.8,13.2,14.7,16.4,16.5,18