[R] Summary --- Local library under Windoze.
rolf at erdos.math.unb.ca
Fri Sep 1 19:11:11 CEST 2006
Prof. Brian Ripley solved the problem. He wrote:
> I was not aware that this works with relative paths for any version
> of R. Try using a full path, which always works for me.
I tried it using a full path, and bingo! It worked
like a charm.
Under Unix the relative path also works, but.
Prof. Ripley also remarked:
> If indeed your filesystem is readonly, you will have problems in
> spades. But is that box just dark and not ticked? (That's a lovely
> Windows gotcha that has caught people here many times.)
That box was indeed just dark and not ticked. I was got!
James W. MacDonald suggested:
> I don't think this is how you should do things, since R won't know
> about this library path. Instead, you should use .libPaths() to set
> your library path and then install using that. Note that you will
> likely need to put a call to .libPaths() into a .Rprofile file in
> order to have this set on startup.
> > dir.create("C:/Documents and Settings/Jim/newlib")
> > .libPaths("C:/Documents and Settings/Jim/newlib")
> > install.packages("zoo")
> Then you can use install.packages("packagename", lib = .libPaths())
> if you want to use the 'stock' library directory, or just
> install.packages("packagename") to use your private one.
This is a red herring. The install.packages() function
does not care if the specified folder is in the library
path. I experimented to verify this. The crucial thing,
as Prof. Ripley suggested, is --- under Windoze --- to
specify the full pathname of the library into which you wish
to install the package.
[Perhaps this might be mentioned in the documentation for
install.packages() --- to save future grief for dweebs
It is indeed correct that R won't know about this library
if it is not in the library path, but you can *tell* it
about this library:
(where ``lnilp'' means ``library not in library path'').
BTW, lib.loc can be specified by the *relative* path name,
with no problem.
Thanks to all.
rolf at math.unb.ca
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