[R] install.packages for local zip files

[Daniel Gatti]

O/S: Linux
R version : 2.2.1

The R server doesn't have http internet access.  And the sys admins will 
not install the R libraries that I requested.  So I have downloaded the 
packages that I want to intall and have moved them into my home 
directory on the server.  These are a series of *.tar.gz files.  I want 
to install the R libraries in my home directory, but I can't get it to 
work.  According to the install.packages documentation :

install.packages(pkgs, lib, repos = getOption("repos"),  contriburl = 
contrib.url(repos, type), method, available = NULL, destdir = NULL, 
installWithVers = FALSE, dependencies = FALSE, type = getOption("pkgType"))

repos: character vector, the base URL(s) of the repositories to use,
       i.e., .... Can be 'NULL' to install from local '.tar.gz' files.

contriburl: URL(s) of the contrib section of the repositories. ......
       Can be 'NULL' to install from local '.tar.gz' files.


 pkgs: character vector of the short names of packages/bundles whose
          current versions should be downloaded from the repositories.
          If 'repos = NULL', a character vector of file paths of
          '.tar.gz' files.  These can be source archives or binary
          package/bundle archive files (as created by 'R CMD build
          --binary'). ......

 lib: character vector giving the library directories where to install 
the packages.  Recycled as needed.

So I have issued a command like this:

 > install.packages(pkgs="~/Rdownloads/hgug4112a_1.12.0.tar.gz", lib = 
"~/Rlib", repos=NULL, contriburl=NULL)

Warning in download.packages(pkgs, destdir = tmpd, available = 
available,  :
         no package '~/Rdownloads/hgug4112a_1.12.0.tar.gz' at the 
repositories

As far as I can tell, I've given it the full path to the zip file, the 
directory in which to install the library and I've set the repository 
path to 'NULL' to indicate that I'm installing from an already 
downloaded zip file.  But I'm missing something.  Any ideas?

Thanks,
Dan