SyntaxHighlighter Brush for the R Language

brush-loader.html

<script type="text/javascript">
SyntaxHighlighter.autoloader(
  "r  path/to/your/syntaxhighlighter/scripts/shBrushR.js",
  "plain  path/to/your/syntaxhighlighter/scripts/shBrushPlain.js",
  "sql  path/to/your/syntaxhighlighter/scripts/shBrushSql.js",
  "js  path/to/your/syntaxhighlighter/scripts/shBrushJScript.js",
  "html xml  path/to/your/syntaxhighlighter/scripts/shBrushXml.js"
);
SyntaxHighlighter.defaults["toolbar"] = false;
SyntaxHighlighter.all();
</script>

brush-r-head.html

<link rel="stylesheet" href="path/to/your/syntaxhighlighter/styles/shCore.css" type="text/css" />
<link rel="stylesheet" href="path/to/your/syntaxhighlighter/styles/shThemeDefault.css" type="text/css" />
<script type='text/javascript' src='path/to/your/syntaxhighlighter/scripts/shCore.js'></script>
<script type='text/javascript' src='path/to/your/syntaxhighlighter/scripts/shAutoloader.js'></script>

brush-r-usage.html

<pre class="brush: r">
test.function = function(r) {
    return(pi * r^2)
}
test.function(1)</pre>

shBrushR.js

/**
 *  Author: Yihui Xie
 *  URL: http://yihui.name/en/2010/09/syntaxhighlighter-brush-for-the-r-language
 *  License: GPL-2 | GPL-3
 */
SyntaxHighlighter.brushes.R = function()
{
    var keywords = 'if else repeat while function for in next break TRUE FALSE NULL Inf NaN NA NA_integer_ NA_real_ NA_complex_ NA_character_';
    var constants = 'LETTERS letters month.abb month.name pi';
    this.regexList = [
    { regex: SyntaxHighlighter.regexLib.singleLinePerlComments, css: 'comments' },
    { regex: SyntaxHighlighter.regexLib.singleQuotedString,     css: 'string' },
    { regex: SyntaxHighlighter.regexLib.doubleQuotedString,     css: 'string' },
    { regex: new RegExp(this.getKeywords(keywords), 'gm'),      css: 'keyword' },
    { regex: new RegExp(this.getKeywords(constants), 'gm'),     css: 'constants' },
    { regex: /[\w._]+[ \t]*(?=\()/gm,               css: 'functions' },
    ];
};
SyntaxHighlighter.brushes.R.prototype   = new SyntaxHighlighter.Highlighter();
SyntaxHighlighter.brushes.R.aliases = ['r', 's', 'splus'];

Thanks!