Passing along ellipsis arguments to two different functions? [duplicate]

Answer 1

You can pass a list to one of the subfunctions, ie

mainF <- function(f1, f2, ..., args.f2 = list()) {
     do.call(f2, c(X=f1(...), args.f2))
}

mainF(function(x) x, function(X, y) X*y, x=5, args.f2 = list(y=3))

(untested, but you got the gist)