[R] Fwd: Converting R to Sweave (Rnw)

[Duncan Murdoch]

On 3/2/2009 10:12 AM, Duncan Murdoch wrote:
> 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.

Actually, the package I was thinking of was roxygen (on CRAN), but I 
couldn't remember the name and a search came up with the R.oo reference. 
  So there appear to be at least two such systems.

Duncan Murdoch

> 
> 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
>> 
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> 
> ______________________________________________
> 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.