History: PluginEquation

             # 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`

{RBOX()} 
Since Tiki 20.x to view equations Tiki needs **the mathjax/mathjax package installed**. 
{RBOX}

## Parameters

{pluginmanager plugin="equation"}

## Examples

### Basic syntax

{TABS(tabs="Before Tiki 20.x|Tiki 20.x+")} 
{CODE(colors="tiki")}
{EQUATION()}your latex formula{EQUATION}
{CODE} 
///// 
{CODE(colors="tiki")}
{EQUATION()}$$your latex formula$${EQUATION}
{CODE} 
{TABS}

### With a famous equation

*This code,*
{CODE(colors="mathematica" theme="default")}{EQUATION()}$$e=mc^2$${EQUATION}
{CODE}

*Would produce on this site:*

{EQUATION()}$$e=mc^2$${EQUATION}

### Another equation

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

*Would produce on this site:*

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

## 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.

{CODE(colors="null")}
\documentclass[12pt]{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\pagestyle{empty}
\begin{document}
$your sexy formula$
\end{document}

{CODE}

## Related pages

- ((MathJax))

## Aliases

- (alias(Latex))