On 06/02/2014 18:25, Patrick Burns wrote:
I suggest that there be an additional sentence
in the explanation for the 'repos' argument in
the help file for 'install.packages':

If the repository is on a local drive, then the
string should begin with \code{file:}, e.g.,
\code{"file:J:/Rrepos"}.


Perhaps I'm missing some subtlety, but it makes
things work in my case.

You are (more than one).  The help says

   repos: character vector, the base URL(s) of the repositories to use,

A file:// scheme *is* a URL, but how to specify it correctly is described under ?url. 'Local drive' is a not a portable concept, but a repository on a file system mounted on the same machine may also be accessible via a http:// scheme.


--
Brian D. Ripley,                  rip...@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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