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* How to specify the output format for each LaTeX fragment when exporting to HTML?
@ 2015-01-23  8:55 Xiaolong Zhang (HKUCS)
  0 siblings, 0 replies; only message in thread
From: Xiaolong Zhang (HKUCS) @ 2015-01-23  8:55 UTC (permalink / raw)
  To: emacs-orgmode

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Hi List,

When I'm exporting LaTeX fragments to HTML, there is a per file option:
>       #+OPTIONS: tex:tDo the right thing automatically (MathJax)
>       #+OPTIONS: tex:nilDo not process LaTeX fragments at all
>       #+OPTIONS: tex:verbatimVerbatim export, for jsMath or so

I like the default (MathJax) way since it looks much better. However, 
can't render everything in LaTeX such as  the "algorithmic" package.

For large fragments, I use the method described in
by using org-babel to export a png file and include it in the resulting 
HTML file.
This works good now when I set the global TeX export option to MathJax, 
and manually make
fragments that Mathjax can't render as images.

However when the formula is simple, this is not a good solution. For 
example, \coloneqq is
a command from package "mathtools", which MathJax doesn't support currently.
Using the org-babel solution will not only make the source code messy, 
but also can't make
the image inline. (Maybe it can, how?)

I can set #+OPTIONS: tex:dvipng such that formula $a \coloneqq b$ can 
rendered inline,
without much extra work. So I'm wondering whether I can specify some of 
the fragments exporting
as images, while use MathJax for the rest.

An example file is attached. If there is any solution/workaround, please 
let me know.
Thanks for your reading!

Best regards,

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#+OPTIONS: tex:t

$a = x \times y$ is rendered as Mathjax.
$a \coloneqq b$ is rendered wrong.

For large environment, use org babel for rendering.
#+header: :exports results :file test.png :results value raw file append
#+header: :imagemagick yes :iminoptions -density 600  -trim :imoutoptions -geometry 400 
#+header: :fit yes :headers '("\\usepackage{algorithmic}")
#+begin_src latex
\STATE $ \theta_j \coloneqq \theta_j - \alpha \frac{\partial}{\partial \theta_j} J(\theta_0,\theta_1) $ \COMMENT{for \(j = 0\) and \(j = 1\)}

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