Argument names function R

Question

I am trying to create a function, and I want to be able to get the names of my arguments , and I used formalArgs (I found it as answer to a question like mine) for that but I don't get what I want (I even tried formals()).

This is my function

entropy= function(...) 
{
rest of the code
print(formalArgs(entropy))
}

when I call the function entropy(h1,h2,h3) the formalArgs prints

$...  

but I want to be able to get

h1,h2,h3

is there a way to do that ? thanks :)

Answer 1

Use substitute() to fetch the unaltered input and deparse it.

entropy= function(h1,h2,h3) 
{
  #rest of the code
  print(c( deparse(substitute(h1)), deparse(substitute(h2)), deparse(substitute(h3))))
}

entropy(a,b,c)
#[1] "a" "b" "c"