In an org file, if I include a MATLAB src block that has a graphic output (a figure is plotted there), for example, the following src block:
#+begin_src matlab :session :file tst.png :results graphics imagesc(rand(100)) #+END_SRC
it won't be shown in the result of the src block (although the file gets saved as it should). Emacs returns,
Code block produces no output (this is "not" the case for a python src block).