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Re: [O] workflow, matlab+latex in org file

From: Uwe Brauer
Subject: Re: [O] workflow, matlab+latex in org file
Date: Tue, 12 Jul 2016 12:44:59 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

>>> "Eric" == Eric S Fraga <address@hidden> writes:

   > On Monday, 11 Jul 2016 at 12:32, Uwe Brauer wrote:
   >> Hello
   >> I want in a org file, to include matlab code and run it (that I know how
   >> to do)
   >> Then I want certain results, which are symbolic variables, expressed in
   >> latex, we I achieve  using matlab's latex command.
   >> Like
   >> #+begin_src matlab :results output
   >> clear all
   >> syms e p R g w K K2
   >> phi=[(e + (e+p)*R^2)^((g-1)/2);((e+p)*R*sqrt(1+R^2))/(e+(e+p)*R^2)]
   >> jac=jacobian(phi,[e,p])
   >> ltxjac=latex(jac)
   >> #+end_src

   > A bit of a kludge but, if you don't want to modify the ob-matlab code,
   > you can explicitly generate LaTeX into a file and use it directly:

   > #+begin_src octave :exports none :results output
   >   clear all
   >   pkg load symbolic
   >   syms e p R g w K K2;
   >   phi=[(e + (e+p)*R^2)^((g-1)/2);((e+p)*R*sqrt(1+R^2))/(e+(e+p)*R^2)];

   >   jac=jacobian(phi,[e,p]);
   >   ltxjac = latex(jac);
   >   fid = fopen("jacobian.tex","w");
   >   fprintf(fid, "%s\n", ltxjac);
   >   fclose(fid);
   >   ltxjac
   > #+end_src

   > \begin{equation}
   > \input{jacobian}
   > \end{equation}

Thanks, that is a solution but  a bit cumbersome because of the
additional latex file. John sent me a hack which seems a bit more

   > I don't have MATLAB so have tested with octave instead...

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