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Asked: 2026-05-14T01:40:33+00:00

ess-mode is Emacs speaks statistics. This mode is useful for editing programs for R

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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 ever I type _ the character is replaced with <-, which is very frustrating. Is there an emacs lisp statement to turn off this behavior?

emacs: 22.1.1
ess-mode release (unknown)

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1 Answer

  1. Editorial Team

    From ESS’s manual (look under “Changes/New Features in 5.2.0”):

    ESS[S]: Pressing underscore (“_”) once inserts ” <- ” (as before); pressing underscore twice inserts a literal underscore. To stop this smart behaviour, add “(ess-toggle-underscore nil)” to your .emacs after ess-site has been loaded

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