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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>
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    <title>Class: RIR::Document [RDoc Documentation]</title>
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    <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>
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            <td class="class-name-in-header">RIR::Document</td>
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          </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">
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          <a href="#M000010">count_words</a>&nbsp;&nbsp;
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          <a href="#M000011">entropy</a>&nbsp;&nbsp;









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          <a href="#M000008">format_words</a>&nbsp;&nbsp;









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          <a href="#M000013">new</a>&nbsp;&nbsp;









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          <a href="#M000009">ngrams</a>&nbsp;&nbsp;
  
          <a href="#M000012">tf</a>&nbsp;&nbsp;









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        </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">&nbsp;[R]&nbsp;</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">&nbsp;[R]&nbsp;</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>









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        <div id="method-M000013" class="method-detail">
          <a name="M000013"></a>









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          <div class="method-heading">









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            <a href="Document.src/M000013.html" target="Code" class="method-signature"
              onclick="popupCode('Document.src/M000013.html');return false;">









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            <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>









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        <div id="method-M000010" class="method-detail">
          <a name="M000010"></a>









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          <div class="method-heading">









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            <a href="Document.src/M000010.html" target="Code" class="method-signature"
              onclick="popupCode('Document.src/M000010.html');return false;">









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            <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 #=&gt; { &quot;guitar&quot;=&gt;1, &quot;bass&quot;=&gt;3, &quot;album&quot;=&gt;20, ... }
  </pre>
  
          </div>
        </div>









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        <div id="method-M000011" class="method-detail">
          <a name="M000011"></a>









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          <div class="method-heading">









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            <a href="Document.src/M000011.html" target="Code" class="method-signature"
              onclick="popupCode('Document.src/M000011.html');return false;">









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            <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>









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    entropy(&quot;guitar&quot;) #=&gt; 0.00432114812727959
    entropy(&quot;dillinger escape plan&quot;) #=&gt; 0.265862076325102









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  </pre>
  
          </div>
        </div>









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        <div id="method-M000009" class="method-detail">
          <a name="M000009"></a>









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          <div class="method-heading">









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            <a href="Document.src/M000009.html" target="Code" class="method-signature"
              onclick="popupCode('Document.src/M000009.html');return false;">









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            <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) #=&gt; [&quot;the free&quot;, &quot;free encyclopedia&quot;, &quot;encyclopedia var&quot;, &quot;var skin&quot;, ...]
  </pre>
  
          </div>
        </div>









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        <div id="method-M000012" class="method-detail">
          <a name="M000012"></a>
  
          <div class="method-heading">
  
            <a href="Document.src/M000012.html" target="Code" class="method-signature"
              onclick="popupCode('Document.src/M000012.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(&quot;guitar&quot;) #=&gt; 0.000380372765310004
  </pre>
  
          </div>
        </div>









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        <h3 class="section-bar">Protected Instance methods</h3>









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        <div id="method-M000008" class="method-detail">
          <a name="M000008"></a>









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          <div class="method-heading">









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            <a href="Document.src/M000008.html" target="Code" class="method-signature"
              onclick="popupCode('Document.src/M000008.html');return false;">









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            <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>