[R] Please, remind a function name

[Gabor Grothendieck]

Note that a significant difference between the two solutions is that
the OO solution allows new methods corresponding to "method="
to be added without changing the function holding the statements.

On 5/22/07, Vladimir Eremeev <wl2776 at gmail.com> wrote:
>
> My solution (after a cup of coffee :) ):
>
> model.formula<-switch(model.type,S=[s-model formula],HK=[hk-model formula])
> model<-lm(model.formula)
>
>
> Gabor Grothendieck wrote:
> >
> > You could use the class dispatching mechanism:
> >
> >
> > mymodel <- function(a, b, method = "S") {
> >       .Class <- method
> >       NextMethod("mymodel")
> > }
> >
> > mymodel.S <- function(a, b, method = "S") cat("S:", a, b, method, "\n")
> > mymodel.HK <- function(a, b, method = "S") cat("HK:", a, b, method, "\n")
> >
> > mymodel(1:3, 1:4)
> > mymodel(1:3, 1:4, "S")
> > mymodel(1:3, 1:4, "HK")
> >
> >
> >
> > On 5/22/07, Vladimir Eremeev <wl2776 at gmail.com> wrote:
> >>
> >> Sorry, I'm stuck. :)
> >>
> >> I am writing a function, which would fit either one linear model or
> >> another
> >> one, depending on its argument model.type.
> >> And I don't want to use several if's, because R allows doing it with much
> >> more beauty.
> >>
> >> That is I am looking for prettier alternative to the following
> >>
> >> AB2C<-function(a,b,model.type="S") { # or HK, and return NULL if this
> >> argument has any other value
> >> [ do some stuff]
> >>
> >>  if(model.type=="S") model<-lm( [s.model formula] )
> >>  else if (model.type == "HK") model<-lm([hk.model formula])
> >>  else model<-NULL
> >>
> >>  return(model)
> >> }
> >>
> >> I was looking at "switch", but didn't come to solution. Sorry <:)
> >
> >
>
> --
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>
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