[Rd] Re: [R] case-insensitive ZIP

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Nov 2 16:28:21 CET 2004

On Tue, 2 Nov 2004, Uwe Ligges wrote:

> Primer, Jeremy (FID) wrote:
> > Uwe and Brian,
> > 
> > Thanks for your attention to this one.
> > 
> > We currently have the following array of atypical situations in our
> > corporate installation:
> > 
> > (1) Central install directory, where I neither have nor can reasonably
> > want Administrator priviledges;
> > (2) IT staff willing to maintain R officially but wants to leave
> > *contributed* packages to user groups if at all possible;
> > (3) Direct access from R to the CRAN not working through any of the
> > methods owing to the proxy server.
> > 
> > So I downloaded some 40 contributed package *.ZIP files directly from
> > CRAN using Internet Explorer, then ran install.packages() in R on these
> > local zipfiles with parameter CRAN=NULL. Except for the case-sensitivity
> > of the "*.zip" extension in install.packages(), which I amended myself,
> > this appears to have worked fine, passed checksums, etc.  Since I
> > installed the packages with install.packages() and they passed checksum,
> > I don't see why they would not work. Some simple tests worked, and
> > setting libPaths() and running installed.packages() suggests that R
> > knows what it has. 
> No, I mean that some self zipped .ZIP files won't work generally. Those 
> on CRAN are build with R CMD INSTALL --build, and they do have the 
> extension .zip rather than .ZIP.
> So it looks like your web browser does strange things with the extension.

And the solution is to fix that.  I've just tested it, and the latest IE6 
does not do it for me, so I suggest you ask your IT staff to repair
the problem on your installation.

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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