This solution works - thanks for the feedback, everyone!

On Thu, Jun 21, 2012 at 1:26 AM, Kohske Takahashi <
takahashi.kohske@gmail.com> wrote:

> In my view the class a and b should inherit same parent, like class c.
> And S3methods should be defined for the class c.
>
> Actually, this is not a workaround.
> It will go with the more oop-ish design.
>
> kohske
>
> 2012/6/21 Winston Chang <winstonchang1@gmail.com>:
> > On Wed, Jun 20, 2012 at 10:49 PM, Martin Morgan <mtmorgan@fhcrc.org>
> wrote:
> >
> >> On 06/20/2012 08:06 PM, Hadley Wickham wrote:
> >>
> >>> But aren't the methods compatible?  If equality doesn't make a method
> >>> compatible what does?
> >>>
> >>
> >> Actually I guess that turns out to be the key (to why they work at the
> >> command line but not in a package).  At the command line they really
> _are_
> >> the same, e.g., .Internal(inspect("+.a")) has the same  address as
> "+.b".
> >> In the package they (e.g., badadd:::"+.a") have different addresses, I
> >> suppose because S3method() acts on them independently.
> >>
> >>
> > Thanks for the investigation. I wonder if there's some sort of
> workaround.
> >
> >
> >
> >>
> >>> But unfortunately that doesn't work for S3 classes (even with
> >>> setOldClass) so it doesn't help much unless we want to rewrite
> >>> everything in S4 :/
> >>>
> >>
> >> rewrite?
> >>
> >
> > Yes, the original question is the result of some issues that came up in
> > ggplot2 development...
> >
> > -Winston
> >
> >        [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-devel@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
>
>
>
> --
> Kohske Takahashi <takahashi.kohske@gmail.com>
>
> Assistant Professor,
> Research Center for Advanced Science and Technology,
> The University of  Tokyo, Japan.
> http://www.fennel.rcast.u-tokyo.ac.jp/profilee_ktakahashi.html
>

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