Latex & Python Tricks in Org

1. Functions To use in file
2. Latex Snippets
3. Latex
4. Computation in Python
5. Using results assigned to variables in Latex

1. Functions To use in file

#+NAME: function
#+begin_src python :var x=10
return 12 + x
#+end_src

2. Latex Snippets

Define a source block called flexibilityMatrix.

#+NAME: flexibilityMatrix
#+begin_src latex
\ensuremath{
    \begin{bmatrix}
      \delta_{11} & \delta_{12}  \\
      \delta_{21} & \delta_{22}
    \end{bmatrix}
}
#+end_src

3. Latex

Use noweb to expand source blocks

#+begin_src latex :noweb yes
\begin{align}
x &= <<function(20)>> \\
\delta &=
<<flexibilityMatrix>>
\end{align}
#+end_src

#+RESULTS:
#+begin_export latex
\begin{align}
x &= 32 \\
\delta &=
\ensuremath{
    \begin{bmatrix}
      \delta_{11} & \delta_{12}  \\
      \delta_{21} & \delta_{22}
    \end{bmatrix}
}
\end{align}
#+end_export

what is 1 + 20 ? src_elisp{(+ 1 20)} {{{results(=21=)}}}

what is 1 + 20 ? 21

4. Computation in Python

You can assign values to variables in Python. And also define a pyeval source block that can evaluate those variables.

#+begin_src python :session threenumbers :exports none
  a = 12
  b = 18
  c = 29
#+end_src

#+NAME: pyeval
#+begin_src elisp :var code="a" session="threenumbers" :exports none
  (org-babel-execute:python code `((:session . ,session) (:result-type . value)))
#+end_src

5. Using results assigned to variables in Latex

Now using the noweb feature, you can use that pyeval evaluator to insert the values from python into your source blocks.

#+begin_src latex :noweb yes :exports both :eval no-export
\begin{align}
  a &= <<pyeval("a")>> \\
  b &= <<pyeval("b")>> \\
  c &= <<pyeval("c")>>
\end{align}
#+end_src

#+RESULTS:
#+begin_export latex
\begin{align}
  a &= 12 \\
  b &= 18 \\
  c &= 29
\end{align}
#+end_export

Backlinks

Org Mode