[ESS] Automatically count / number code chunks?

[svga at arcor.de]

Hi list,

this is more a feature request than a question. Is there a simple way
of automatically number code chunks in an Rnw file?  Mostly, I do
not label the code chunks and so I had to move manuallyto a code chunk
when an error occurred, what can be a pain when the there are dozen of
chunks. It would be nice to have a function 'ess-go-to-chunk-number'
or similar. Unfortunately I am unfamiliar Emacs Lisp.

I use latest ESS and Emacs on Ubuntu.

Thanks and regards, Sven