Update: ravel.org looks like a better solution for knitr in Org-mode. Thanks, Charles Berry.
The syntax of knitr/Sweave is not compatible with the Org-mode in Emacs. Ideally we should be able to write an R code chunk like this:
If we want to use knitr in the Org-mode, we have to cheat a little bit by putting the R code chunks in
#+end_LATEX, then convert the org document to tex, then rename to rnw, and finally process with knitr to get the real tex output.
Prasad Chalasani experimented with the above idea and put up a repository OrgKnitr on GitHub so that you can use his script to quickly compile an org document to PDF. Thanks, Prasad!
Actually I do not know much about Org-mode. If you have other ideas about the Org-mode, I’d love to hear about them too.