Re: [R] how to check if ... is empty

2009-07-16 Thread Dimitris Rizopoulos
one way is: test <- function(x, y, ...) { dots <- list(...) if (length(dots)) cat("\nnon-empty\n") else cat("\nempty\n") } test(1, 1) test(1, 1, 1) I hope it helps. Best, Dimitris Thomas Roth (geb. Kaliwe) wrote: Hi, I was wondering what would be the best way to check if the three

Re: [R] how to check if ... is empty

2009-07-16 Thread Sundar Dorai-Raj
Try dots <- list(...) if (length(dots) == 0) { ## do something } On Thu, Jul 16, 2009 at 6:46 AM, Thomas Roth (geb. Kaliwe) wrote: > Hi, > > I was wondering what would be the best way to check if the three dots > argument contains any arguments (i.e. does ... contain any arguments or not? > ) >

[R] how to check if ... is empty

2009-07-16 Thread Thomas Roth (geb. Kaliwe)
Hi, I was wondering what would be the best way to check if the three dots argument contains any arguments (i.e. does ... contain any arguments or not? ) #Example test = function(x,y, ...) { #Wanted R-Code # if(empty(...)) #do some calculation plot(x,y,...) } Thanks Thoma