[R] Library control
dwinsemius at comcast.net
Wed Jul 25 02:02:21 CEST 2012
On Jul 21, 2012, at 3:35 PM, R. Michael Weylandt wrote:
> They are called packages, not libraries.
> On Jul 21, 2012, at 5:19 PM, darnold <dwarnold45 at suddenlink.net>
>> 1. Is there a command that tells you what libraries are loaded?
> Loaded is a fluid idea** in a namespace world, but search() will let
> you know what's on the search path (accessible to you)
There is also unloadNamespace() which may be more complete, although I
do not think complete sanity is guaranteed.
>> 2. How do you remove a library that has been loaded?
> detach() can do it, but there might be lingering effects. The only
> true way is to restart your session.
>> 3. If you have loaded a library that masks previously loaded
>> objects, how
>> can you tell which object is being run? In Matlab, I would run
>> "which f" to
>> determine the location of the file f that will be run. Is there a
>> procedure in R?
> Not exactly, but take a look at conflicts() and the :: operator.
> **Well, loading is a particular step in the package management
> process, but probably not what you are thinking of.
David Winsemius, MD
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