Re: [R] Please, remind a function name

From: Vladimir Eremeev <wl2776_at_gmail.com>
Date: Tue, 22 May 2007 12:32:40 -0700 (PDT)

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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Received on Tue 22 May 2007 - 20:58:38 GMT

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