[R] How to know created time of object in R?

Duncan Temple Lang duncan at wald.ucdavis.edu
Tue Nov 6 18:03:55 CET 2007

Hash: SHA1

Of course, Brian is correct that the problem requires a great
deal more specificity.  However, one could imagine that it would
be useful to tag objects created by top-level expressions
with the time they were created in much the same way that the
file system provides a modification time.

It is easy enough to add the time as an attribute of an object,
but I imagine you are asking how to automate this.
To this end, you could do something with the addTaskCallback() function
which allows you to specify a function that is invoked
at the completion of each top-level evaluation.  You could
get store some useful time information with the object
or perhaps go further and work with the expressions
to determine dependencies and capture the dependencies in
a series of computations.


Dong-hyun Oh wrote:
> Dear UseRs,
> I would like to know the created time and date of specific object.
> Is there any function for it?
> Thank you in advance.
> Sincerely,
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