Re: [R] data encapsulation with classes

From: hadley wickham <>
Date: Sun 08 Apr 2007 - 14:06:26 GMT

On 4/8/07, Roger Bivand <> wrote:
> On Sun, 8 Apr 2007, Peter Williams wrote:
> > Hi All,
> >
> > I'm new to R from a C and Octave/Matlab background. I am trying to
> > construct some classes in R to which I want to attach pieces of data.
> > First, is attr(obj, 'member name') <- data the accepted way of doing
> > this?
> No, it isn't. You seem to be trying to deduce new-style classes from a
> representation used before R 2.4, but in any case it would not be
> sensible. Please consult John M. Chambers. Programming with Data.
> Springer, New York, 1998, and/or William N. Venables and Brian D. Ripley.
> S Programming. Springer, New York, 2000, or for a shorter online resource:

Unfortunately, all of those references are at least 4 years out of date when it comes to S4 methods. Is there any comprehensive reference of the current implementation of the S4 OO system apart from the source code?

Hadley mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Mon Apr 09 00:10:20 2007

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