Hi I am thinking about using Sweave more frequently, especially for documenting code. But the syntax is slightly awkward for me (<<name>>... @), and I was thinking if there would be a way of importing the type of code extracted from an Rnw file back into an Rnw file? The advantage would be that the code could run in R without tangling. Obviously, sweave options could not be imported, but that would be fine for me. Below an example of the code generated by Rtangle, which I would like to import into a sweave file. Cheers Rainer ################################################### ### chunk number 1: a ################################################### x <- 10 ################################################### ### chunk number 2: ################################################### asequence<- seq(from=0,to=5,by=0.1) expnegx2 <- exp(-asequence^2) plot(asequence,expnegx2,type="l",ylab=expression(exp(-z^2)),xlab="z") ################################################### ### chunk number 3: Normal1 ################################################### mu <- 3 sigma <- 5 -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Faculty of Science Natural Sciences Building Private Bag X1 University of Stellenbosch Matieland 7602 South Africa
Rainer M Krug-6 wrote:> > Hi > > I am thinking about using Sweave more frequently, especially for > documenting code. But the syntax is slightly awkward for me (<<name>>> ... @), and I was thinking if there would be a way of importing the > type of code extracted from an Rnw file back into an Rnw file? The > advantage would be that the code could run in R without tangling. > Obviously, sweave options could not be imported, but that would be > fine for me. Below an example of the code generated by Rtangle, which > I would like to import into a sweave file. > > Cheers > > Rainer > > ################################################### > ### chunk number 1: a > ################################################### > x <- 10 > > > > ################################################### > ### chunk number 2: > ################################################### > asequence<- seq(from=0,to=5,by=0.1) > expnegx2 <- exp(-asequence^2) > > plot(asequence,expnegx2,type="l",ylab=expression(exp(-z^2)),xlab="z") > > > ################################################### > ### chunk number 3: Normal1 > ################################################### > mu <- 3 > sigma <- 5 >This seems like trying to put the cart before the horse to my mind. A .Rnw is a hybrid of LaTeX and R code the later is delineated from the former by being encapsulated by the (<<name>>= ... @) tags which also define whether the results and/or images should be included in the LaTeX output. If you always want to use Sweave to document your code thats you're prerogative, but its really designed for writing a report with the R-code embedded, some of that code (reading in files etc.) is not relevant to the code so is suppressed, whilst others the output of the commands is required (and you duly write the tags around the R code to show the relevant output). If all you want to do is comment you're code, then I see nothing wrong or hard about using the '#' delimiter which comments out all text that follows its insertion in your .R file. Personally when I write Sweave documents I include comments in the R section of the files using this delimiter. Neil -- View this message in context: http://www.nabble.com/Fwd%3A-Converting-R-to-Sweave-%28Rnw%29-tp22288734p22289546.html Sent from the R help mailing list archive at Nabble.com.
On 3/2/2009 9:06 AM, Rainer M Krug wrote:> Hi > > I am thinking about using Sweave more frequently, especially for > documenting code. But the syntax is slightly awkward for me (<<name>>> ... @), and I was thinking if there would be a way of importing the > type of code extracted from an Rnw file back into an Rnw file? The > advantage would be that the code could run in R without tangling. > Obviously, sweave options could not be imported, but that would be > fine for me. Below an example of the code generated by Rtangle, which > I would like to import into a sweave file.I don't think so, but writing a new driver is only a medium difficulty job. Start with an existing one in https://svn.r-project.org/R/trunk/src/library/utils/R/Sweave.R and modify until you have what you want. The harder part of this is the design: exactly what input and output is not going to be awkward? A different approach to the same problem is to use specially formatted comments in the R source to generate documentation; I think the R.oo package includes such a thing, and there may be others. I haven't used these with R, but have in other languages, and they were nice there. Duncan Murdoch> > Cheers > > Rainer > > ################################################### > ### chunk number 1: a > ################################################### > x <- 10 > > > > ################################################### > ### chunk number 2: > ################################################### > asequence<- seq(from=0,to=5,by=0.1) > expnegx2 <- exp(-asequence^2) > > plot(asequence,expnegx2,type="l",ylab=expression(exp(-z^2)),xlab="z") > > > ################################################### > ### chunk number 3: Normal1 > ################################################### > mu <- 3 > sigma <- 5 > > -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Faculty of Science > Natural Sciences Building > Private Bag X1 > University of Stellenbosch > Matieland 7602 > South Africa > > ______________________________________________ > R-help at 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.