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
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
