[R] How do I really, I mean really, unload a package?

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Sep 24 21:09:33 CEST 2014

On 24/09/2014 19:56, Kevin Wright wrote:
> Sorry if this is well-known, but I can't find an answer or maybe just don't
> know how to ask Google the right question.  If I run the following code in
> R (3.1.1), I find that lattice:::xyplot.formula is still available (or
> maybe just a promise to it ... ???) even though I've used detach and
> unloadNamespace.  Is there another step I'm missing?

You just loaded it again.  Read ?`:::` .

The only way to make a package's namespace really unavailable is to 
uninstall it.

> require(lattice)
> head(lattice:::xyplot.formula)
> detach(package:lattice)
> search() # No longer on search list
> loadedNamespaces() # But namespace is still loaded
> unloadNamespace("lattice")
> loadedNamespaces() # Namespace not loaded
> head(lattice:::xyplot.formula)  # It is still accessible
> Kevin
> 	[[alternative HTML version deleted]]
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PLEASE do: no HTML, do your homework before posting.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK

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