[R] zip.file.extract on Windows

[Prof Brian Ripley]

The current (you give no version information) help file says:

     file: A file name. (If a path is given, see 'Note'.)

  zipname: The file name (not path) of a 'zip' archive, including the
           '".zip"' extension if required.
...

      This is a helper function for 'help', 'example' and 'data'.  As
      such, it handles file paths in an unusual way.  Any path component
      of 'zipname' is ignored, and the path to 'file' is used only to
      determine the directory within which to find 'zipname'.

You do seem to have missed all of these hints, as well as the posting 
guide (see the comments at the end of this reply).

On Fri, 30 Mar 2007, Gregg Lind wrote:

> Hello R-help!
>
> I just wanted to share a tip might help others of us stuck on R.

> The documentation for zip.file.extract is rather scant, and a few
> examples would.

> When using zip.file.extract, the first argument should be the full (or
> relative) path and the second the name of the zip file, it seems.

> While this is counterintuitive to me, that it should get the part from

what is 'the part' here?

> the first argument, and apply that path to the second, it seems to how
> this works.

> This seems to me to be the wrong approach, since it won't handle folders
> inside the zipfile correctly.

> Am I missing something?  Should I just use "unz" instead?
>
> Thanks,
>
> Gregg L.
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

PLEASE do!  It asked you to give 'the output from sessionInfo()' and to 
'try the current R-patched or R-devel version of R'.  As the sources are 
online so you really should have checked 
https://svn.r-project.org/R/trunk/src/library/utils/man/zip.file.extract.Rd

-- 
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