yasnippet's TAB-expand does not expand snippets in .Rnw files (so with R's Sweave)

[Marius Hofert]

Hi,

I have exactly the problem described here:
http://groups.google.com/group/smart-snippet/browse_thread/thread/8206a23037f598b1/39ed819692df63ad?lnk=gst&q=rnw&pli=1
Unfortunately, the described solution does not work -- TAB does not
expand (ya)snippets in my .Rnw files. You can find a detailed
description of the problem on:
http://tex.stackexchange.com/questions/49530/yasnippet-sweave-how-to-make-snippets-work-from-rnw-files
I work on Mac OS X 10.7.3 with the very latest version of R (and ESS;
both from today) and yasnippet-0.6.1c.

Cheers,

Marius