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orange-text / docs / old-html / widgets / catalog / Text / Preprocess.htm

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<title>Preprocess</title>
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<h1>Preprocess</h1>

<img class="screenshot" src="../icons/TextPreprocess.png">
<p>Preprocess the text, according to the language in which it is written.</p>

<h2>Channels</h2>

<h3>Inputs</h3>

<DL class=attributes>
<DT>Examples (ExampleTable)</DT>
<dd>Attribute-valued data set.</dd>
</dl>

<h3>Outputs</h3>
<DL class=attributes>
<DT>Examples (ExampleTable)</DT>
<DD>Attribute-valued data set with the text attribute preprocessed according to
the selected options.</DD>

<h2>Description</h2>

<p>Preprocess widget is used to lemmatize, convert to lower case, and remove stop words
from texts in a number of languages. Any of these options can be turned on or off
in the Options box. The language box is used to choose the language in which the
text is written. Lemmatization and the list of stop words depend on the choice
of the language. Info box displays the number of documents in the collection and
the name of the text attribute.</p>

<a href="Preprocess.png"><img class="schema" src="Preprocess.png" alt="Preprocess widget"></a>

<h2>Examples</h2>

<p>Below is a simple example how to use this widget. The input is fed
directly from the <a href="TextFile.htm">Text File</a> widget, and the output
to the <a href="BagOfWords.htm">Bag of Words</a> widget.</p>

<a href="Preprocess-Example.png"><img src="Preprocess-Example.png" alt="Schema with Preprocess"
 class="schema"></a>


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