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Render an equation written in LaTeX syntax as an image

Plugin Equation

Use this wiki plugin, introduced in Tiki2, to render an equation written in LaTeX syntax as an image. See also MathJax.

Prerequisites

PhP

This plugin must have the php function EXEC enabled on the server for it to work.

LaTex

LaTex distribution must be installed on your server. Check you have installed the following LaTex packages:
    • inputenc
    • amsmath
    • amsfonts
    • amssymb

  • You should have a :
    • /usr/bin/latex, /usr/bin/dvips, /usr/bin/convert, /usr/bin/identify and /usr/bin/convert
    • If the path of these tasks are incorrect, you must adjust the php code in lib/equation/class.latexrender.php
  • the directories lib/equation/tmp/ and lib/equation/pictures must be writeable by the server.

The following directories need write permissions for the plugin to work:
lib/equation/tmp
lib/equation/pictures

Parameters

Introduced in Tiki2.
Preferences required: wikiplugin_equation
Parameters Accepted Values Description Default Since
(body of plugin) equation
size digits Size expressed as a percentage of the normal size. 100 produces the default size. 200 produces an image twice as large. 100 2.0


Examples

Basic syntax

{EQUATION()}your latex formula{EQUATION}

With a famous equation

This code,
{EQUATION()}e=mc^2{EQUATION}


Would produce on this site:

e=mc^2

Another equation

This code,
{EQUATION()}
<math>\setlength{\unitlength}{1cm}
 \begin{picture}(4,2)
 \put(1,1){\circle{3}}
 \put(3,1){\circle*{5}}
 \end{picture}
 </math>
{EQUATION}


Would produce on this site:

<math>\setlength{\unitlength}{1cm}
 \begin{picture}(4,2)
 \put(1,1){\circle{3}}
 \put(3,1){\circle*{5}}
 \end{picture}
 </math>

Customizations

This plugin actually wraps a minimalistic LaTex around the formula. For instance, you can customize lib/equation/class.latexrender.php if you want other fonts.

\documentclass[12pt]{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\pagestyle{empty}
\begin{document}
$your sexy formula$
\end{document}

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doc.tiki.org


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