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

**From**: |
Eric S Fraga |

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

**Date**: |
Mon, 11 Jul 2016 17:42:34 +0100 |

**User-agent**: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.94 (gnu/linux) |

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:
--8<---------------cut here---------------start------------->8---
#+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}
--8<---------------cut here---------------end--------------->8---
I don't have MATLAB so have tested with octave instead...
--
: Eric S Fraga (0xFFFCF67D), Emacs 25.0.94.1, Org release_8.3.4-869-gf2c421