[R] ESS with Xemacs? [vs. Emacs, slightly off topic]

[Warnes, Gregory R]

 >  From: Agustin Lobo [mailto:alobo at ija.csic.es]
 >  Sent: Tuesday, January 08, 2002 7:47 AM
 >  
 >  Happy 2002 to everyone.
 >  
 >  I'm following Greg's directions (with some pain, as I'm not
 >  an experienced (x)emacs user) and I find that I cannot use 
 >  fix() in the R session. 
 >  Before trying (x)emacs I normally had
 >  a "raw" R session in an xterm and an editor in another window.
 >  When I was done writing the function I run fix() and copied 
 >  and pasted
 >  the function to the editor session that had been opened by fix().
 >   
 >  I understand that, using (x)emacs I can save the function to a
 >  text file and source() it in R, but this seems like an odd
 >  procedure considering that both R and the function are in 
 >  windows of the same (x)emacs environment. Is there any simpler
 >  way of passing the edited function to R?

Hi Agustin,

Are you using the emacs/xemacs package 'ESS'?  [Highly recommended.] If you
are, you can use '<Control>-<C> <Control>-<D> function-name' to bring a
function in an (x)emacs buffer.  

To get edit/fix to work properly under (x)emacs, you need to tell R that you
want it to call 'gnuclient' for editing.  Do this by either setting the
environment variable 'EDITOR' before starting R or by setting
options(editor=...) with R.  Note that setting the EDITOR environment
variable will effect lots of programs...

In my shell startup script I set my environment variable EDITOR to point to
a small script file called 'MyEdit' that contains

	#!/bin/sh
	gnuclient $* || vi $*

this first tries to open the file using 'gnuclient'.  If this fails, which
it will if (x)emacs is not running, it then tries to open the file using
'vi'.  This works well for me.

 >  By the way, is there an R-oriented guide or tutorial
 >  to (x)emacs?

In the ESS source directory, the doc/README.S contains a brief tutorial on
using Splus/R with (x)emacs.  Its not a real tutorial, but it should still
be quite helpful.

For a more general tutorial (x)emacs, try '<Control>-h t'

It takes a while to get used to (x)emacs, but it really is a good
environment for interacting with R/Splus once you've mastered it.

-Greg


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