how should I make the optional arguments in r?

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Hello,

The question is a bit confusing, but for what I could understand, try 
changing to

rr <- getrange(dataw, mydatao, method = method)

Hope this helps,

Rui Barradas

Em 24-01-2013 18:26, Tammy Ma escreveu:
HI,

I guess I did sth wrong with the optional argument in the program. but I don't know how should I make it.

in my main program:

source("getelasticity_overPB.r")

crossprice<-getelasticity(mydata,mydatao,"nest")$cross_p
is same with
crossprice<-getelasticity(mydata,mydatao)$cross_p
I don't know why????

In ""getelasticity_overPB.r":
I have the function:

getelasticity=function(mydata,mydatao,method=NULL){

.....
source("runmodel.r")
rr<-getrange(dataw,mydatao,method=NULL)
#I have tested that rr<-getrange(dataw,mydatao) is different with rr<-getrange(dataw,mydatao,"nest"): which is what I want.

rr

}

how should I make it work???

Thanks for your help.

Kind regards,
Tammy

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