#+name: one
#+begin_src octave :noweb yes
a = 1
#+end_src
#+name: two
#+begin_src octave :noweb yes
<<one>>
b = 2
#+end_src
#+name: three
#+begin_src octave :noweb yes
<<two>>
a+b
#+end_src

#+results: three
: 3

The results of calling three are call_three().