中国人民大学统计学院王剑.ppt

中国人民大学 统计学院王 剑,From SAS to R,你属于哪一类?,熟悉SAS，但不熟悉R,不熟悉SAS，但熟悉 R,既不熟悉SAS，也不熟悉 R,SAS和R的本质区别,RRequires all the data to be in memory,SASReads one observation at a time,Code,Data Example;input Name$X1-X2;Xm=mean(Of X1-X2);cards;Zhao 22 98Wang 24 96;proc print;run;,SAS,R,Example=data.frame(Name=c(Zhao,Wang),X1=c(22,24),X2=c(98,96)mean(Example,2-3),Name X1 X21 Zhao 22 982 Wang 24 96X1 X2 23 97,Obs Name X1 X2 Xm1 Zhao 22 98 602 Wang 24 96 60,Output,FREE,-R for SAS SPSS users,Bob Muenchen,SAS的五大部分,Statistical and graphical procedures,Data input and management statements,Output Delivery System,A macro language,A matrix language to add new algorithms(IML),Data Example;input Name$X1-X2;Xm=mean(Of X1-X2);cards;Zhao 22 98Wang 24 96;proc print;run;,SAS,Thank You！,