On Thu, 17 Jun 2004, Meinhard Ploner wrote:
> It's possible to create a package with functions and data,
> from which the use
>
> library(pkg-name)
>
> "attaches" not only the functions, but also the data?
> I want avoid to use
>
> data(dataset, package="name")
>
> because this makes a global copy of the data-set ...
What do you mean by `global'? You cannot have access to R data without
having it in memory and having it visible. You don't need to have it in
the user workspace (.GlobalEnv), though. Suggestions:
1) See how MASS does it. Data objects are loaded into the MASS namespace
on first use.
2) See ?attach and attach an R save file containing your datasets --
wasteful unless you use them all at once.
It is planned that data() will be superseded by a better mechanism in R
2.0.0 (but that plan has slipped a bit already, which is why MASS does it
differently).
--
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