Thanks Winston. That seems like a workaround that might be usefully
included into unloadNamespace.
Paul
On 15-01-09 12:09 PM, Winston Chang wrote:
It's probably because the first thing that unloadNamespace does is this:
ns <- asNamespace(ns, base.OK = FALSE)
If you call asNamespace("tseries"), it calls getNamespace("tseries"),
which has the side effect of loading that package (and its dependencies).
One way to work around this is to check loadedNamespaces() before you
try to unload a package.
-Winston
On Thu, Jan 8, 2015 at 9:45 AM, Paul Gilbert <pgilbert...@gmail.com
<mailto:pgilbert...@gmail.com>> wrote:
In the documentation the closed thing I see to an explanation of
this is that ?detach says "Unloading some namespaces has undesirable
side effects"
Can anyone explain why unloading tseries will load zoo? I don't
think this behavior is specific to tseries, it's just an example. I
realize one would not usually unload something that is not loaded,
but I would expect it to do nothing or give an error. I only
discovered this when trying to clean up to debug another problem.
R version 3.1.2 (2014-10-31) -- "Pumpkin Helmet"
and
R Under development (unstable) (2015-01-02 r67308) -- "Unsuffered
Consequences"
...
Type 'q()' to quit R.
> loadedNamespaces()
[1] "base" "datasets" "graphics" "grDevices" "methods" "stats"
[7] "utils"
> unloadNamespace("tseries") # loads zoo ?
> loadedNamespaces()
[1] "base" "datasets" "graphics" "grDevices" "grid" "lattice"
[7] "methods" "quadprog" "stats" "utils" "zoo"
>
Somewhat related, is there an easy way to get back to a "clean"
state for loaded and attached things, as if R had just been started?
I'm trying to do this in a vignette so it is not easy to stop and
restart R.
Paul
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