Age of an object?
Trevor Hastie <hastie at stanford.edu> wrote:
It would be nice to have a date stamp on an object. In S/Splus this was always available, because objects were files.
The "g.data" package on CRAN stores R objects in individual files, like the (old) S-Plus model. The timestamp on a file tells you the last time "g.data.save()" was invoked on that object. Its primary purpose is to make objects available (as promises) without filling up memory until an object is actually used. -- David Brahm (brahm at alum.mit.edu)