I see Matt Aldridge has given you the answers to your specific questions.
If you are used to using SAS you might find Bob Meunchen's book "Muenchen, R. A. (2008). R for SAS and SPSS Users (1st ed.). Springer." useful. A shorter version is available as a pdf at http://rforsasandspssusers.com/. The pdf is a very useful guide for anyone beginning to use R. --- On Mon, 7/27/09, zhijie zhang <rusers...@gmail.com> wrote: > From: zhijie zhang <rusers...@gmail.com> > Subject: [R] How should i change the SAS Codes into R Codes? > To: r-h...@stat.math.ethz.ch > Received: Monday, July 27, 2009, 11:03 AM > Dear R users, > I have a SAS codes with several loops in it, and i > hope to use R to do the > same task. The SAS codes are as follows, > /*to generate the dataset*/ > DATA Single_Simulation; > DO se=0 to 1 by 0.01; > DO sp=0 to 1 by 0.01; > DO DR=0 to 1 by 0.01; > TR=(DR+sp-1)/(se+sp-1+1.0e-12); > Adjust_Factor=TR/(DR+1.0e-12); > OUTPUT; > END; > END; > END; > RUN; > > /*to select some data*/ > DATA sampledata; > SET Single_Simulation; > IF DR=0.02 & sp=1; > RUN; > > #I tried the following codes with R,failed > num<-seq(0, 1, by = 0.01) > for (se in num) { > for (sp in num) { > for (DR in num) { > TR=(DR+sp-1)/(se+sp-1+1.0e-12) > Adjust_Factor=TR/(DR+1.0e-12) > } > } > } > > My questions are, > 1. What is the correct codes for R to do the similar task? > 2. Sometimes, the simulated dataset are very large, so i > need to put the > generated dataset in a file with large disk place, not in > the memory, how to > do it? SAS can do it with the 'libname' argument, do > R have the similar > method? > Thanks a lot. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org > mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, > reproducible code. > __________________________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now http://ca.toolbar.yahoo.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.