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,
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