Hi all, suppose I have following user defined function:
fn1 = function(x, y, ...) { z <- x+y; u=y^2 # if something with name "add" exists in the function argument then do some calculation and return that calculated value, NOT z # if NOT then return z return(z) } As you see in the function definition, I put open space " '.' syntax " , so that user can put additional argument. However here what I want to do is, if user have additional input then above function would do some ***special calculation*** and return that value. How can I accomplice that? Thanks and regards, [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.