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 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
Thomas Roth
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
