RE: [R] Stumped on methods

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Fri 16 Jul 2004 - 22:41:27 EST


Jim,

As Uwe said, that's not what NextMethod() is for. I suspect what you really want is simply cat()ing the object that you created in your print() method. If you look in must print() and summary() methods, you'll see a lot of cat().

HTH,
Andy

> From: Uwe Ligges
>
> Jim Lemon wrote:
>
> > I have been trying to write a "proper" print method for a
> package, and have
> > almost gotten what I want. From a reading of the relevant
> section in R
> > Extensions and the introduction to methods, I've stuck the
> whole business
> > into a character object and used:
> >
> > NextMethod("print")
>
> Well, it depends.
> If you have some inheritance of classes, you may reallay want to use
> NextMethod(), but that's not necessary if you want to write your own
> print method print.myclass() to print stuff that is not from any
> superclass....
> Check out how to write methods in, e.g., Venables and Ripley
> (2000): "S
> Programming", Springer.
>
> Uwe Ligges
>
>
>
> > However, instead of not printing quotes and displaying the usual
> > representation of the string, I get the whole string,
> newlines and all, in
> > quotes. My attempt to shamelessly copy someone else's print method
> > was foiled as most of them don't display when one types the
> function name. I
> > presume this is a feature of namespaces.
> >
> > Needless to say, searching the archives for "print &
> method" retrieved a
> > cornucopia of useless information. I wonder if anyone would
> be kind enough to
> > inform me where to look for the proper incantation? Thanks.
> >
> > RedHat EL3 L:inux
> > R-1.9.1
> > Last.Drink - Aurora Expresso
> >
> > Jim
> >
> > ______________________________________________
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> http://www.R-project.org/posting-guide.html
>
>
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>



R-help@stat.math.ethz.ch mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Jul 16 22:50:40 2004

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