On Sat, 31 Jan 2004, Roger D. Peng wrote:
> Yes, that's true, but I was under the impression that since the
> bzip2 sources are included with the R sources, that the bzip2
> capability is always compiled in (either using the included
> sources or a system library). Also, the NEWS file for 1.9.0 says:
>
> o configure no longer lists bzip2 and PCRE as `additional
> capabilities' as all builds of R have had them since
> 1.7.0.
Roger is correct. Capabilities has not been changed, since earlier
versions did not have bzfile (and even earlier ones did not have gzfile).
>
> -roger
>
> Dirk Eddelbuettel wrote:
>
> > On Sat, Jan 31, 2004 at 08:37:05PM -0500, Roger D. Peng wrote:
> >
> >>I'm putting together a data package and am finding that I get
> >>enormous savings in space by using bzip instead of the usual gzip
> >>in save(). Is it safe to assume that for R versions, say >=
> >>1.7.1, that the function bzfile() will always be available?
> >
> >
> > I don't think that is correct as this an optional compile-team feature.
> >
> > help(bzfile) says it 'may' be present whereas gzfile is guaranted (from a
> > 1.9.0 snapshot):
> >
> > All platforms support (gz)file connections and 'url("file://")'
> > connections. The other types may be partially implemented or not
> > implemented at all. (They do work on most Unix platforms, and all
> > but 'fifo' on Windows.)
> >
> > but then goes on to say under See Also:
> >
> > 'capabilities' to see if 'gzfile', 'url', 'fifo' and
> > 'socketConnection' are supported by this build of R.
> >
> > which suggests that even gzfile may not be guaranteed.
> >
> > You could of course test via capabilities() and abort with a clear error.
> >
> > Dirk
> >
>
> ______________________________________________
> [EMAIL PROTECTED] mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
>
>
--
Brian D. Ripley, [EMAIL PROTECTED]
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
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
