Re: [Rd] S3 methods for cbind/rbind

From: Vincent Goulet <vincent.goulet_at_act.ulaval.ca>
Date: Wed 27 Sep 2006 - 20:24:02 GMT

Hum. Then, I need to be more accurate. My object is of class c("bar", "data.frame"). So, by virtue of ...

     The dispatch algorithm is described in the source file
     ('.../src/main/bind.c') as

        1.  For each argument we get the list of possible class
           memberships from the class attribute.

        2.  We inspect each class in turn to see if there is an an
           applicable method.

... rbind(foo) is never sent to rbind.bar(). So I guess my questions stand.

Le Mercredi 27 Septembre 2006 16:16, Gabor Grothendieck a écrit :
> Actually you can add your own method. See
>
> library(zoo)
> rbind.zoo
>
> for an example.
>
> On 9/27/06, Vincent Goulet <vincent.goulet@act.ulaval.ca> wrote:

> > I created a type of object similar to a data frame. In some
> > circumstances, It needs special methods for "[" and "[<-" and rbind()
> > (but not cbind()). Then I found this in the cbind()/rbind() man page:
> >
> > The method dispatching is _not_ done via 'UseMethod()', but by
> > C-internal dispatching. Therefore, there is no need for, e.g.,
> > 'rbind.default'.
> >
> > This seems to imply I cannot add my own method. Is there 1) a workaround
> > to and 2) a rationale for this? (Other than creating a generic Rbind() or
> > whatever, that is.)
> >
> > I'm using S3 methods.
> >
> > Thanks in advance!
> >
> > --
> > Vincent Goulet, Associate Professor
> > École d'actuariat
> > Université Laval, Québec
> > Vincent.Goulet_at_act.ulaval.ca http://vgoulet.act.ulaval.ca
> >
> > ______________________________________________
> > R-devel@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel

-- 
  Vincent Goulet, Associate Professor
  École d'actuariat
  Université Laval, Québec 
  Vincent.Goulet_at_act.ulaval.ca   http://vgoulet.act.ulaval.ca

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Received on Thu Sep 28 06:28:24 2006

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