From mboxrd@z Thu Jan  1 00:00:00 1970
From: Uwe Brauer <oub@mat.ucm.es>
Subject: Re: babel, matlab export plot to png fails
Date: Wed, 16 Aug 2017 21:52:56 +0000
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   > I do not have matlab, but looking at the code in ob-matlab.el and
   > ob-octave.el, it seems that the usual header args should do:

   > :  :results graphics :file testplot.png

   > and delete the print statement in the last line.

I just tried it, results in an empty png file.