The Mac R-Gui has a nice feature where when you start typing a function, the bottom status bar tells you what arguments the function takes. For example, see the following image, when I type traceback:
I love this feature, but would really like it if I could use Vim to get similar functionality with R, preferably something that worked well with Mac-Vim. Is there something that will display a function’s arguments on the bottom of the screen (or in a mouse-over) when I begin typing an R function in (Mac)VIM?
Perhaps: http://www.vim.org/scripts/script.php?script_id=2628
If you want to use the R function that the MacGUI uses for completion try
?rcompgen.