Document.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Class: RIR::Document [RDoc Documentation]</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<link rel="stylesheet" href="../.././rdoc-style.css" type="text/css" media="screen" />
<script type="text/javascript">
// <![CDATA[
function popupCode( url ) {
window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400")
}
function toggleCode( id ) {
if ( document.getElementById )
elem = document.getElementById( id );
else if ( document.all )
elem = eval( "document.all." + id );
else
return false;
elemStyle = elem.style;
if ( elemStyle.display != "block" ) {
elemStyle.display = "block"
} else {
elemStyle.display = "none"
}
return true;
}
// Make codeblocks hidden by default
document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }<\/style>" )
// ]]>
</script>
</head>
<body>
<div id="classHeader">
<table class="header-table">
<tr class="top-aligned-row">
<td><strong>Class</strong></td>
<td class="class-name-in-header">RIR::Document</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../../files/lib/rir/document_rb.html">
lib/rir/document.rb
</a>
<br />
</td>
</tr>
<tr class="top-aligned-row">
<td><strong>Parent:</strong></td>
<td>
Object
</td>
</tr>
</table>
</div>
<!-- banner header -->
<div id="bodyContent">
<div id="contextContent">
<div id="description">
<p>
A <a href="Document.html">Document</a> is a bag of words and is constructed
from a string.
</p>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000024">count_words</a>
<a href="#M000025">entropy</a>
<a href="#M000022">format_words</a>
<a href="#M000027">new</a>
<a href="#M000023">ngrams</a>
<a href="#M000026">tf</a>
</div>
</div>
</div>
<!-- if includes -->
<div id="section">
<div id="attribute-list">
<h3 class="section-bar">Attributes</h3>
<div class="name-list">
<table>
<tr class="top-aligned-row context-row">
<td class="context-item-name">doc_content</td>
<td class="context-item-value"> [R] </td>
<td class="context-item-desc"></td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">words</td>
<td class="context-item-value"> [R] </td>
<td class="context-item-desc"></td>
</tr>
</table>
</div>
</div>
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000027" class="method-detail">
<a name="M000027"></a>
<div class="method-heading">
<a href="Document.src/M000027.html" target="Code" class="method-signature"
onclick="popupCode('Document.src/M000027.html');return false;">
<span class="method-name">new</span><span class="method-args">(content)</span>
</a>
</div>
<div class="method-description">
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000024" class="method-detail">
<a name="M000024"></a>
<div class="method-heading">
<a href="Document.src/M000024.html" target="Code" class="method-signature"
onclick="popupCode('Document.src/M000024.html');return false;">
<span class="method-name">count_words</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Returns a Hash containing the words and their associated counts in the
current <a href="Document.html">Document</a>.
</p>
<pre>
count_words #=> { "guitar"=>1, "bass"=>3, "album"=>20, ... }
</pre>
</div>
</div>
<div id="method-M000025" class="method-detail">
<a name="M000025"></a>
<div class="method-heading">
<a href="Document.src/M000025.html" target="Code" class="method-signature"
onclick="popupCode('Document.src/M000025.html');return false;">
<span class="method-name">entropy</span><span class="method-args">(s)</span>
</a>
</div>
<div class="method-description">
<p>
Computes the entropy of a given string <tt>s</tt> inside the document.
</p>
<p>
If the string parameter is composed of many words (i.e. tokens separated by
whitespace(s)), it is considered as an ngram.
</p>
<pre>
entropy("guitar") #=> 0.00432114812727959
entropy("dillinger escape plan") #=> 0.265862076325102
</pre>
</div>
</div>
<div id="method-M000023" class="method-detail">
<a name="M000023"></a>
<div class="method-heading">
<a href="Document.src/M000023.html" target="Code" class="method-signature"
onclick="popupCode('Document.src/M000023.html');return false;">
<span class="method-name">ngrams</span><span class="method-args">(n)</span>
</a>
</div>
<div class="method-description">
<p>
Returns an Array containing the <tt>n</tt>-grams (words) from the current
<a href="Document.html">Document</a>.
</p>
<pre>
ngrams(2) #=> ["the free", "free encyclopedia", "encyclopedia var", "var skin", ...]
</pre>
</div>
</div>
<div id="method-M000026" class="method-detail">
<a name="M000026"></a>
<div class="method-heading">
<a href="Document.src/M000026.html" target="Code" class="method-signature"
onclick="popupCode('Document.src/M000026.html');return false;">
<span class="method-name">tf</span><span class="method-args">(s)</span>
</a>
</div>
<div class="method-description">
<p>
Computes the term frequency of a given <b>word</b> <tt>s</tt>.
</p>
<pre>
tf("guitar") #=> 0.000380372765310004
</pre>
</div>
</div>
<h3 class="section-bar">Protected Instance methods</h3>
<div id="method-M000022" class="method-detail">
<a name="M000022"></a>
<div class="method-heading">
<a href="Document.src/M000022.html" target="Code" class="method-signature"
onclick="popupCode('Document.src/M000022.html');return false;">
<span class="method-name">format_words</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Any non-word characters are removed from the words (see <a
href="http://perldoc.perl.org/perlre.html">perldoc.perl.org/perlre.html</a>
and the W special escape).
</p>
<p>
Protected function, only meant to by called at the initialization.
</p>
</div>
</div>
</div>
</div>
<div id="validator-badges">
<p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p>
</div>
</body>
</html>