[R] Passing parameters in a user defined function to another function using ...

Lopez, Dan lopez235 at llnl.gov
Tue Nov 19 03:47:42 CET 2013

Thanks Ben.

I feel really dumb. I did enter '...' in my sample function in another version of this function. But I just realized I had only done it for the second occurrence of the sample function and not the first.


-----Original Message-----
From: Ben Tupper [mailto:btupper at bigelow.org] 
Sent: Monday, November 18, 2013 6:00 PM
To: Lopez, Dan
Cc: R help (r-help at r-project.org)
Subject: Re: [R] Passing parameters in a user defined function to another function using ...


It's easy, just carry the arguments in '...' forward to where you expect to pass them along.

 numbs<-sort(sample(y,z, ...))
 for (i in 1:(x-1))
   numbs<-rbind(numbs,sort(sample(y,z, ...)))


On Nov 18, 2013, at 8:52 PM, "Lopez, Dan" <lopez235 at llnl.gov> wrote:

> Hi R Experts,
> How do you get the ... to work in a user-defined function such as the one I have below?
> For example if I want to pass replace=TRUE to the sample function.
> # This is a sample function that generates x rows of z numbers out of y. Basically a lottery style data set.
> mynumbs<-function(x,y,z=5,...){
>  #x should be a scalar indicating number of rows  #y & z are passed to 
> sample function  #in the future will add option to output as 
> data.frame instead of matrix
>  numbs<-sort(sample(y,z))
>  for (i in 1:(x-1))
>    numbs<-rbind(numbs,sort(sample(y,z)))
>  print(numbs)
> }
> 	[[alternative HTML version deleted]]
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Ben Tupper
Bigelow Laboratory for Ocean Sciences
60 Bigelow Drive, P.O. Box 380
East Boothbay, Maine 04544

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