[R] Command-line editing re-visited.

[Thomas Vogels]

Prof Brian D Ripley <ripley at stats.ox.ac.uk> writes:

> A couple of small points.
> 
> On Fri, 7 Sep 2001, Rolf Turner wrote:
> 
> ...
> 
> > (b) Thomas Vogels suggested
> >
> > >  Once you fire up the newly built R, you can verify that the readline
> > >  library was picked up correctly using the capabilities function:
> > >
> > > R> capabilities("cledit")
> > > cledit
> > >   TRUE
> >
> > When I did
> >
> > 	> capabilities("cledit")
> >
> > I got
> >
> > 	logical(0)
> >
> > The help on capabilities evinced no reference to ``cledit''.
> > Is something missing here?
> 
> You need 1.3.1 for this.

(...which I silently assumed Rolf has since he's compiling R himself...)


> > So, I now come to my QUESTION:  How ***do*** you persuade the R
> > command-line editor to use vi syntax?  Ideally I would like to be
> > able to put something into an ``init'' file (.Renviron???) so that
> > I always get vi syntax when I fire up R.  Failing that, something
> > that I can put into a .First() function.
> 
> Try man readline:
> You want something like  `set keymap vi-insert' in your .inputrc, I think.

Rolf: The alternative is the line `set editing-mode vi' in your
~/.inputrc file.

R developers: According to the readline manual, you should be able to
set the editing-mode (or any other option) depending on the
application that uses the readline library.  So the following should
work:

$if R
set editing-mode vi
$endif

... but doesn't.  (The same construct works for bash with `$if bash'...)

Does R set its application name to something else (or none at all)?

Regards,
  -tom



-- 
mailto:tov at ece.cmu.edu (Tom Vogels)   Tel: (412) 268-6638   FAX: -3204
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