Hi,
Assuming that matlab-mode and matlab-shell are working, org-babel natively
supports matlab code execution.
Your org-babel-execute:matlab overrides the org-babel defaults in ob-octave.el,
which can be inspected there.
I enable the babel support in .emacs as
(org-babel-do-load-languages
'org-babel-load-languages
'(
(latex . t)
(plantuml . t)
(java . t)
(matlab . t)
(C . t)
(csharp . t)
(table . t)
)
)
after this, C-c C-c will execute the code, but the next snippet in .emacs makes
the sessions continuous, and simplifies the arguments given each time
(setq org-babel-default-header-args:matlab
'((:session . "*MATLAB*")
(:results . "silent")
)
)
More an org answer than matlab.el, but I hope these help.
Cumhur Erkut
> On Oct 24, 2017, at 22:53, Uwe Brauer <[email protected]> wrote:
>
> Hi
>
> I am using more and more org mode, a long with auctex and matlab.el.
> Orgmode comes in handy if I write a document which contains (matlab)
> code which I want to execute, but the rest of the file maybe text, which
> I can then export to latex.
>
> So a typical file looks like
>
> Given
> \droppoints
> \begin{displaymath}
> \begin{cases}
> \frac{du}{dt}&= -t u^2,\\
> u(0)&=1,
> \end{cases}
> \end{displaymath}
>
> Solve using ...
>
>
> #+BEGIN_solution
> #+begin_src matlab :results output latex :exports results :eval never-export
> f=@(t,y)[-t*y^2];
> [t,y]=mieuler(f,[0 1],1,2);
> disp('\begin{align*}')
> fprintf('t = [%g \\qquad %g \\quad %g] \\\\\n', t)
> fprintf('y = [%g \\qquad %g \\qquad %g] \n', y)
> disp('\end{align*}')
> #+end_src
>
> Now I can execute the matlab code in that org file using
>
> C-c C-c ( org-ctrl-c-ctrl-c, the *one-ring-to-rule-them-all* function in
> orgmode.
>
> Thanks thanks to a function provided to me by John Kitchin it executes
> matlab.
>
> It is as follows:
>
> (defun org-babel-execute:matlab (body params)
> (interactive "P")
> (let* ((current-file (buffer-file-name))
> (code (org-element-property :value (org-element-context)))
> (result-params (cdr (assoc :result-params params)))
> m-file
> md5-hash)
> (with-temp-buffer
> (insert code)
> (setq md5-hash (md5 (buffer-string))
> mbuffer (format "*m-%s*" md5-hash)
> m-file (format "m-%s.m" md5-hash)))
> ;; create the file to run
> (with-temp-file m-file
> (insert code))
> (let ((results (shell-command-to-string
> (concat
> "/usr/local/bin/matlab "
> "-nodesktop -nojvm -nosplash -nodisplay <"
> m-file))))
> (delete-file m-file)
> (when results
> ;; strip out >>
> (setq results (replace-regexp-in-string ">> " "" results))
> ;; remove first 10 lines that are the header.
> ;; matlab license seem to expire soon, so 5 warning lines are added
> ;; change first 10 to first 15 lines
> (setq results (mapconcat 'identity
> (nthcdr 10 (split-string results "\n"))
> "\n")))
> (org-babel-result-cond result-params
> results))))
>
> The problem of that code is that it starts matlab every time I execute
> C-c C-c . There seems to be a python based kernel around which avoids
> this, but I thought that maybe with a bit of hacking one could use the
> elisp based matlab-shell and the corresponding functions.
>
> Anybody has an idea, Eric?
> Needless to say that I played a bit around but did get it to work....
>
> Regards
>
> Uwe Brauer
>
>
>
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