data=as.data.frame(matrix( sample( 0:20 , 15 , replace=F) , ncol=5)) colnames(data)=c("math" , "english" , "biology" , "music" , "R-coding" ) rownames(data)=paste("mister" , letters[1:3] , sep="-") # 用于生成雷达图的最大最小值 data=rbind(rep(20,5) , rep(0,5)...