ESS (Emacs Speaks Statistics) now supports compiling knitr

First, new version of ESS needs to be installed.  I use Aquamacs, so I want to make sure that I update Aquamacs. You can do this by uncommenting appropriate lines in Makeconf file of the ESS distribution (search for Aquamacs in Makeconf file).

Two variables need to be set within emacs.

• Change 'ess-swv-processor' to 'knitr'
• Set the variable 'ess-swv-plug-into-AUCTeX' to use the existing interface for compiling LaTeX files: i.e., C-c C-c

Now you should be able to use 'C-c C-c Sweave' or 'C-c C-c LaTeXSweave' commands to compile your Rnw files.