[Rd] save() size in XDR
Prof Brian Ripley
ripley at stats.ox.ac.uk
Thu Feb 26 20:31:15 MET 2004
On Thu, 26 Feb 2004, Duncan Murdoch wrote:
> On Thu, 26 Feb 2004 08:21:05 -0800 (PST), Nathan Whitehouse
> <nlwhitehouse at yahoo.com> wrote :
> >Dear R-devel,
> > Is there a way to find the size in bytes of a save()
> >command --before-- the file has been saved?
> I don't think so, though you can guess: integers are stored in 4
> bytes, floats in 8, etc.
> One way to solve this problem would be to create a connection that did
> nothing except keep track of a file position, then do the save to that
> connection. However, it's not easy to define new connection types.
> Might be a nice package to write to allow such a thing.
I don't think it is worth it. Just use an anonymous file connection and
seek to the end to measure the length. (Similar to Luke's use of a pipe,
but more portable.)
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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