[ESS] ess-r-args-show

[Stephen Eglen]

> I also can not get ess-eldoc to work in a file.R buffer, even though
> emacs tells me that it is active as a minor mode. Strangely enough
> ess-eldoc does work in the *R* buffer since I added this to my .emacs:
> (add-hook 'inferior-ess-mode-hook 'ess-use-eldoc)
Yes, you need that hook to get eldoc working in *R* buffers.

> And yes, the *R* was started directly from the file.R buffer but
> ess-eldoc still does not work...
that is odd.  When you are in the file.R buffer, and that has a *R*
process associated with it, put your point over a function, such as
"rnorm" and then do 

  M-: (ess-eldoc)

if ess-eldoc is working, you should see the following in the minibuffer:

"rnorm: n, mean = 0, sd = 1"

Stephen