How to stop emacs from replacing underbar with <- in ess-mode

Question

ess-mode is \"Emacs speaks statistics.\" This mode is useful for editing programs for R or Splus (two separate statistics packages).

In my buffer, when

Answer 1

Since the feature is useful. You can assign it to other key which is less used by you in R it will automatically unassign it from underscore. I personally assign it to ";" by adding following line in .emacs file.

(setq ess-smart-S-assign-key ";")

My version of emacs is 24.3 All-in-one installation file by Vincent Goulet.(Installed on windows 7)

hope this helps

Edit In emacs 25.2 above do not work instead add following in the .emacs file

(setq ess-smart-S-assign-key ";")
(ess-toggle-S-assign nil)
(ess-toggle-S-assign nil)