Suppose we have a function such as the following F <- function(f, x) f(x)+1
which runs function f and then transforms it. I would like the corresponding function which works the same except that unlike F returns an invisible result if and only if f does. Is there some way of determining whether f returns an invisible result or not? Thus we want this: f <- function(x) x g <- function(x) invisible(x) > F(f, 1) 2 > > F(g, 1) > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
