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From: | Neil Jerram |
Subject: | Re: [O] babel, matlab export plot to png fails |
Date: | Tue, 15 Aug 2017 11:12:40 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
On 13/08/17 10:33, Uwe Brauer wrote:
Hi I would like to execute some matlab code in org file (using GNU emacs 26 and the git version of org mode) and save the result of the plot command in a png file, so I tried #+begin_src matlab :session :exports both :file testplot.png t=[0:0.1:1]; y=sin(t); plot(t,y) print -dpng testplot.png #+end_src And also #+begin_src matlab :results output latex :exports results :file testplot.png t=[0:0.1:1]; y=sin(t); plot(t,y) print -dpng testplot.png #+end_src But the resulting png files are corrupt. I presume also the matlab commands are included in the png file which is not correct. But I don't know who to achieve that just the last command is saved in a png file.
I guess the problem is that the Matlab line "print -dpng testplot.png" is correctly writing the plot to testplot.png, as you want, but then org-mode is overwriting that file because of the ":file testplot.png". I would try deleting ":file testplot.png".
The meaning of ":results output" may be a bit language-dependent - I don't know org-mode well enough to be sure about that yet - but in general I would expect it to consist of the standard output of those commands. So, for example, if you type "print -dpng testplot.png" and Matlab responds with "Generated 'testplot.png'", I would expect ":results output" to contain "Generated 'testplot.png'", not the PNG data.
Regards - Neil
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