[R] How do I really, I mean really, unload a package?
kw.stat at gmail.com
Wed Sep 24 22:24:22 CEST 2014
To follow up, my attempt at creating a minimal example went a bit too minimal.
What I _think_ actually happened to me is that I loaded two packages
with identical-named S3 methods for a generic. Even after unloading
the second package, the S3 methods for that package were still
registered and somehow re-loaded (?) when I tried to print an object
(of the same class) that had been created using the first package.
I found a post by Professor Ripley which seems to confirm something to
the effect that it is not possible to unregister S3 methods:
In that sense, it appears that it is not possible to completely undo
the loading of a package.
Thanks to Bill Dunlap and Professor Ripley.
On Wed, Sep 24, 2014 at 2:16 PM, William Dunlap <wdunlap at tibco.com> wrote:
> Running pkg::func or pkg:::func has the side effect of loading pkg's
> namespace, if it is not already loaded. Use remove.packages() to
> remove the package from your machine if you want to make its namespace
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
> On Wed, Sep 24, 2014 at 11:56 AM, Kevin Wright <kw.stat at gmail.com> 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?
>> search() # No longer on search list
>> loadedNamespaces() # But namespace is still loaded
>> loadedNamespaces() # Namespace not loaded
>> head(lattice:::xyplot.formula) # It is still accessible
>> [[alternative HTML version deleted]]
>> R-help at r-project.org mailing list
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
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