On Tue, Jan 31, 2012 at 7:18 AM, Terry Therneau <thern...@mayo.edu> wrote: > Three thinngs - > My original questions to R-help was "who do I talk to". That was > answered by Brian R, and the discussion of how to change Sweave moved > offline. FYI, I have a recode in hand that allows arbitrary reordering > of chunks; but changes to code used by hundreds need to be approached > cautiously. Like the witch says in Wizard of Oz: "... But that's not > what's worrying me, it's how to do it. These things must be done > delicately, or you hurt the spell." > > A few emails have made me aware of others who use noweb. Most of > them, as I have, use the original Unix utility. But since survival is > so interwoven with R I am trying to impliment that functionality > entirely in R to make the code self contained. Just working out how to > best do so. > > Yihui: with respect to the note below, I don't see why you want to add > new syntax. Why add "run_chunk(a)" when it is a synonym for <<a>>?
A short answer is it is easy to implement, because run_chunk() uses eval() which naturally supports recursion (you can eval(parse(text = "eval(parse(text = ...))"))). I think I will add <<>> in the next few days too. There have been quite a few features like this one that I did not plan to do because I do not use them at all, but I added them to knitr one by one anyway when I saw convincing reasons (function overhead problems in this case). So I really appreciate these discussions. I feel r-devel is not a good place for me to chime in, so I will turn the discussion irrelevant to r-devel offline later. > > Terry T. > > Regards, Yihui -- Yihui Xie <xieyi...@gmail.com> Phone: 515-294-2465 Web: http://yihui.name Department of Statistics, Iowa State University 2215 Snedecor Hall, Ames, IA ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
