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<!DOCTYPE html>
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Copyright (c) 2003-2014, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.md or http://ckeditor.com/license
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<title>Mathematical Formulas — CKEditor Sample</title>
<script src="../../../ckeditor.js"></script>
<link href="../../../samples/sample.css" rel="stylesheet">
<meta name="ckeditor-sample-name" content="Mathematics plugin">
<meta name="ckeditor-sample-group" content="Plugins">
<meta name="ckeditor-sample-description" content="Create mathematical equations in TeX and display them in visual form.">
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<h1 class="samples">
<a href="../../../samples/index.html">CKEditor Samples</a> » Mathematical Formulas
</h1>
<div class="description">
<p>
This sample shows the usage of the CKEditor mathematical plugin that introduces a MathJax widget. You can now use it to create or modify equations using TeX.
</p>
<p>
TeX content will be automatically replaced by a widget when you put it in a <code><span class="math-tex"></code> element. You can also add new equations by using the <strong>Math</strong> toolbar button and entering TeX content in the plugin dialog window. After you click <strong>OK</strong>, a widget will be inserted into the editor content.
</p>
<p>
The output of the editor will be plain TeX with <a href="http://www.mathjax.org/">MathJax</a> delimiters: <code>\(</code> and <code>\)</code>, as in the code below:
</p>
<pre class="samples">
<span class="math-tex">\( \sqrt{1} + (1)^2 = 2 \)</span>
</pre>
<p>
To transform TeX into a visual equation, a page must include the <a href="http://docs.mathjax.org/en/latest/start.html">MathJax script</a>.
</p>
<p>
In order to use the new plugin, include it in the <code><a class="samples" href="http://docs.ckeditor.com/#!/api/CKEDITOR.config-cfg-extraPlugins">config.extraPlugins</a></code> configuration setting.
</p>
<pre class="samples">
CKEDITOR.replace( '<em>textarea_id</em>', {
<strong>extraPlugins: 'mathjax'</strong>
} );
</pre>
<p id="ie8-warning">
Please note that this plugin is not compatible with Internet Explorer 8.
</p>
</div>
<textarea id="editor1" cols="10" rows="10">
<p>The following equations are represented in the HTML source code as LaTeX expressions.</p><h1>The Cauchy-Schwarz Inequality</h1><p><span class="math-tex">\( \left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right) \)</span></p><h1>The probability of getting <span class="math-tex">\(k\)</span> heads when flipping <span class="math-tex">\(n\)</span> coins is</h1><p><span class="math-tex">\(P(E) = {n \choose k} p^k (1-p)^{ n-k} \)</span></p><p>Finally, while displaying equations is useful for demonstration purposes, the ability to mix math and text in a paragraph is also important. This expression <span class="math-tex">\(\sqrt{3x-1}+(1+x)^2\)</span> is an example of an inline equation. As you see, MathJax equations can be used this way as well, without disturbing the spacing between the lines.</p>
</textarea>
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