[R] attaching data to any object

Patrick Burns pburns at pburns.seanet.com
Mon Nov 10 21:28:18 CET 2003

An alternative that might alleviate Uwe's scepticism:

Many functions such as the modelling functions have
a "call" component or attribute which is the result of


within the function.  This makes the resulting object essentially
self-documenting.  I find it easier to write functions with the
returned object including "call" than to _accurately_ document
objects by hand.

In some settings the "call" can cause problems since it is a
language object.  This can be solved by using


in place of the raw match.call call.

Patrick Burns

Burns Statistics
patrick at burns-stat.com
+44 (0)20 8525 0696
(home of S Poetry and "A Guide for the Unwilling S User")

Uwe Ligges wrote:

> Rajarshi Guha wrote:
>> Hi,
>>   is the following possible - in a given session I make a lot of objects
>> and save when exiting. Usually I note down seperately what each object
>> is about. Is it possible to attach data to any object which would
>> essentially be a short note explaining the meaning of it?
> You can add an attribute as in:
> x <- 1:10
> attributes(x) <- list(my.note = "This is a test")
> but I think it is not really what you are going to do...
> Uwe Ligges
>> Thanks,
>> -------------------------------------------------------------------
>> Rajarshi Guha <rxg218 at psu.edu> <http://jijo.cjb.net>
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>> -------------------------------------------------------------------
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