I was a happy ESS and R user to obtain
Rnw file with
knitr. I have followed the answer given here, everything worked fine but after several updates or maybe new installation I cannot even find the
ess-sweave customization group in Emacs. M-x
I am using GNU Emacs 25.1.1 on Debian 9 (stable).
> sessionInfo() R version 3.5.2 (2018-12-20) Platform: x86_64-pc-linux-gnu (64-bit) Running under: Debian GNU/Linux 9 (stretch) > packageVersion("knitr")  ‘1.21
ESS version is 20190306.2305.
What am I missing to start to use
knitr with ESS?