Document.html 7.66 KB
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  <title>Class: RIR::Document [RDoc Documentation]</title>
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    <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="#M000010">count_words</a>&nbsp;&nbsp;

        <a href="#M000011">entropy</a>&nbsp;&nbsp;

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

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

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

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

      </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>


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

        <div class="method-heading">

          <a href="Document.src/M000013.html" target="Code" class="method-signature"
            onclick="popupCode('Document.src/M000013.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-M000010" class="method-detail">
        <a name="M000010"></a>

        <div class="method-heading">

          <a href="Document.src/M000010.html" target="Code" class="method-signature"
            onclick="popupCode('Document.src/M000010.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 #=&gt; { &quot;guitar&quot;=&gt;1, &quot;bass&quot;=&gt;3, &quot;album&quot;=&gt;20, ... }
</pre>

        </div>
      </div>


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

        <div class="method-heading">

          <a href="Document.src/M000011.html" target="Code" class="method-signature"
            onclick="popupCode('Document.src/M000011.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(&quot;guitar&quot;) #=&gt; 0.00432114812727959
  entropy(&quot;dillinger escape plan&quot;) #=&gt; 0.265862076325102
</pre>

        </div>
      </div>


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

        <div class="method-heading">

          <a href="Document.src/M000009.html" target="Code" class="method-signature"
            onclick="popupCode('Document.src/M000009.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) #=&gt; [&quot;the free&quot;, &quot;free encyclopedia&quot;, &quot;encyclopedia var&quot;, &quot;var skin&quot;, ...]
</pre>

        </div>
      </div>


      <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>


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


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

        <div class="method-heading">

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



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