From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rasmus <rasmus@gmx.us>
Subject: Re: latex equations and $ sign
Date: Fri, 06 Jun 2014 17:00:03 +0200
Message-ID: <8738fixevg.fsf@gmx.us>
References: <CAKrPhPOde-ABMYYB0Y7hfJvy7Qp32Y9p-HzDkqekq-=5W2Gm9g@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:53227)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1WsvaV-0006T6-Kb
	for emacs-orgmode@gnu.org; Fri, 06 Jun 2014 10:57:54 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1WsvaO-00018c-U3
	for emacs-orgmode@gnu.org; Fri, 06 Jun 2014 10:57:47 -0400
Received: from plane.gmane.org ([80.91.229.3]:38335)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1WsvaO-00018X-Ne
	for emacs-orgmode@gnu.org; Fri, 06 Jun 2014 10:57:40 -0400
Received: from list by plane.gmane.org with local (Exim 4.69)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1WsvaM-0002V9-2v
	for emacs-orgmode@gnu.org; Fri, 06 Jun 2014 16:57:38 +0200
Received: from ip-pool-137.iue.it ([192.167.90.137])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Fri, 06 Jun 2014 16:57:38 +0200
Received: from rasmus by ip-pool-137.iue.it with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Fri, 06 Jun 2014 16:57:38 +0200
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: emacs-orgmode@gnu.org

Federico Beffa <beffa@ieee.org> writes:

> Hi,
>
> I would like to have a mathematical equation typeset in latex and
> automatically generated by sympy, embedded in an equation environment:
>
>   #+NAME: mass-energy
>   #+BEGIN_SRC python :results raw :exports results :wrap EQUATION
>     import sympy as sp
>     E, m, c = sp.symbols('E, m, c', real=True, positive=True)
>     E = m*c**2
>     return sp.latex(E)
>   #+END_SRC
>
>
>   #+NAME: eq:1
>   #+RESULTS: mass-energy
>   #+BEGIN_EQUATION
>   c^{2} m
>   #+END_EQUATION
>
> The problem I'm facing is that despite the fact that the equation is
> already in a mathematical mode latex environment, it still gets sub- and
> superscripts surrounded by a $ sign. Here is the generated latex snippet:
>
> \begin{equation}
> \label{eq:1}
> c$^{\text{2}}$ m
> \end{equation}
>
> Is there a way to teach org-mode not to insert $ signs in equation
> environments?

Is there a reason you are not using a mode argument like this:

    #+NAME: mass-energy
    #+BEGIN_SRC python :results raw :exports results :post
      import sympy as sp
      E, m, c = sp.symbols('E, m, c', real=True, positive=True)
      E = m*c**2
      return sp.latex(E, mode="inline")
    #+END_SRC

    #+RESULTS: mass-energy
    $c^{2} m$


Alternatively, if you need to combine stuff you could use the post
argument

    #+name: wrapper
    #+BEGIN_SRC emacs-lisp :var x=""
    (format "\\(%s\\)" x)
    #+END_SRC
    
    #+NAME: mass-energy
    #+BEGIN_SRC python :results raw :exports results :post wrapper(x=*this*)
      import sympy as sp
      E, m, c = sp.symbols('E, m, c', real=True, positive=True)
      E = m*c**2
      return sp.latex(E)
    #+END_SRC

    #+RESULTS: mass-energy
    \(c^{2} m\)

—Rasmus

-- 
El Rey ha muerto. ¡Larga vida al Rey!