Re: [Rd] standardization of slot access

From: Roger D. Peng <>
Date: Tue 26 Sep 2006 - 21:56:19 GMT

I think slot() is only necessary in the case where you have

a <- "myslot"
slot(object, a)

which is equivalent to


It seems unlikely that you would use slot() during interactive use, but perhaps more so in programming. Even still, I rather infrequently find the need for slot() because classes have defined slot names---if you're going to access a slot, just use the name that you gave it in the class definition since that doesn't change from instance to instance.


Sebastian P. Luque wrote:
> Hi,
> I'm usually confused about when to use 'slot' or '@'. I've frequently
> read that it's always preferable to use accessor functions, so I would
> think the '@' operator should be avoided. However, ?slot contains the
> following advise:
> "Generally, the only reason to use the functional form rather than the
> simpler operator is _because_ the slot name has to be computed."
> How do we decide whether to use the function or the operator?
> Cheers,

Roger D. Peng  |

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