[R] Get "home" directory and simple I/O

[Gabor Grothendieck]

path.expand("~") also seems to work on Windows XP.

On 3/23/07, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:
> But the request was for a *generic* solution.  On Windows there
> might not be anything corresponding to a home directory (and the rw-FAQ
> discusses the concept and how R resolves this).
>
> The best answer I know of is path.expand("~").
>
> On Fri, 23 Mar 2007, Henrik Andersson wrote:
>
> > Sys.getenv("HOME") works in Linux at least
>
> But not all Unix shells have it set, and a user can unset or reset it.  To
> be perverse:
>
> gannet% unsetenv HOME
> gannet% R --slave
> Sys.getenv("HOME")
> HOME
>   ""
> path.expand("~")
> [1] "/data/gannet/ripley"
> q()
>
> (If you set HOME to something other than your home directory it will be
> honoured.)
>
> >
> > - Henrik
> >
> > Andris Jankevics wrote:
> >> If you want get a username of user currently running R on Linux,you can use a
> >> system command and read enviroment variables:
> >>
> >> paste("/home/",system ("whoami",intern=TRUE),sep="")
>
> And my home directory is not '/home/ripley' on any of the Linux boxes I
> use (even though it exists on some of them), e.g. on my compute server
>
> > path.expand("~")
> [1] "/data/gannet/ripley"
>
> and on our main cluster
>
> > path.expand("~")
> [1] "/home/markov/ripley"
>
>
> >> Andris Jankevics
> >>
> >> On Piektdiena, 23. Marts 2007 14:30, Alberto Monteiro wrote:
> >>
> >>> Is there any generic function that gets the "home" directory? This
> >>> should return /home/<user> in Linux and
> >>> x:/Documents and Settings/<user> (or whatever) in Windows XP.
>
> [...]
>
> --
> Brian D. Ripley,                  ripley at stats.ox.ac.uk
> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
> University of Oxford,             Tel:  +44 1865 272861 (self)
> 1 South Parks Road,                     +44 1865 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>
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