I believe that #if lines for C++ programs is handled by the preprocessor, not the compiler. So if you want the same functionality for R programs, it would make sense to just preprocess the R file.
-- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Peng Yu > Sent: Tuesday, August 18, 2009 3:55 PM > To: r-h...@stat.math.ethz.ch > Subject: [R] Is there a construct for conditional comment? > > Hi, > > In C++, I can use the following construct to choice either of the two > blocks the comment but not both. Depending on whether the number after > "#if" is zero or not, the commented block can be chose. I'm wondering > if such thing is possible in R? > > #if 0 > commented with 0 > #else > commented with 1 > #endif > > Regards, > Peng > > ______________________________________________ > 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. ______________________________________________ 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.
