Re: [Rd] How to change names when importing with a NAMESPACE (was: NAMESPACE Q: does import as exist?)

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Wed 08 Feb 2006 - 19:08:04 GMT

This is indeed described in

http://www.stat.uiowa.edu/~luke/R/namespaces/morenames.html

linked from developer.r-project.org.

with the comment

   The purpose of baz is to import some of the exports of foo and bar and    re-export them, using renaming in one case: bar's export g is imported    under the internal name hh, and the internal variable hh is exported    under the name gg. [Renaming seems like a useful option, but it may    turn out to create too many complications and need to be dropped.]

It's been there since 1.7.0 and not yet been dropped. (I would also suggest checking the R-News article on namespaces, which I have not done. But checking the developer site is always worthwhile.)

It would be nice to have more end-user documentation on namespaces, and I have suggested it in the past. A project for you, perhaps?

On Wed, 8 Feb 2006, Seth Falcon wrote:

> Well, it seems that the following does what I want. In the NAMESPACE
> file, one can do:
>
> importFrom("pkgA", foo=bar)
>
> Which will allow you to use the symbol 'foo' to refer to pkgA::bar.
> This is exactly what I wanted.
>
> Despite the lack of documentation, this seems an intentional feature.
> Is there a reason not to document it and allow it as part of the
> NAMESPACE feature set?
>
> Best,
>
> + seth

-- 
Brian D. Ripley,                  ripley@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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Received on Thu Feb 09 07:37:33 2006

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