Attach object cache
Place a stored object cache one the search path, or change the position of such a cache already on the search path.
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The name of the cache directory from which items are to be removed. May be given as a character string, or as a name, (i.e. without quotes) for convenience. The default is as follows:
The enclosing directory where the cache directory is to be found. The default is as follows:
The position on the search path where the object cache is to be placed, or the new position if the cache is already on the search path.
Logical. Are multiple copies of the same cache on the search path to
be disallowed? If
Extra arguments to be passed on to internal
An existing object cache is attached to the search path. If the
object cache directory,
file.path(lib.loc, lib), currently does
not exist a warning is issued to that effect, but also advising that
the directory will be created when an object is to be
Nothing of interest. The function is used solely for its side-effect on the search path
If the cache is not presently attached to the search path, it is sliently attached at postion 2 before objects are removed from it.
Old caches made in pre-release versions of
SOAR (known as
ASOR) will be converted to the present format with a
warning that this is happening. After this conversion only the
current version of the package may be used to access the cached
This function is not often needed, as any of the other main functions,
Remove and their variants), will
automatically attach the object cache if required to do so. A common
use is to change the position of a currently attached object cache on
the search path.
To release an object cache from the search path, use the standard
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## change default cache, keeping any previous setting oldLC <- Sys.getenv("R_LOCAL_CACHE", unset = ".R_Cache") Sys.setenv(R_LOCAL_CACHE=".R_Test") ## generate some dummy data dummy <- rnorm(100) mn <- mean(dummy) va <- var(dummy) Attach() # may give warning ## store it in the stored object cache Store(dummy, mn, va) Search() Attach(pos=3) # change to pos=3 Search() Objects() Remove(mn, va) Objects() Remove(Objects()) # empty the cache detach(".R_Test") # remove from search path Sys.setenv(R_LOCAL_CACHE=oldLC) # restore normal default
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