** adding file names to literal values on export
   :PROPERTIES:
   :DATE:     2010-06-01
   :END:

#+name: three
: 9

#+begin_src R :var num=three :exports results
runif(n=num, min=0, max=1)
#+end_src

#+begin_src R :var num=3 :exports results
runif(n=num, min=0, max=1)
#+end_src