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<li class="toctree-l1 has-children"><a class="reference internal" href="sklearn.compose.html">sklearn.compose</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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<li class="toctree-l1 has-children"><a class="reference internal" href="sklearn.datasets.html">sklearn.datasets</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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<li class="toctree-l1 has-children"><a class="reference internal" href="sklearn.decomposition.html">sklearn.decomposition</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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<li class="toctree-l1 current active has-children"><a class="current reference internal" href="#">sklearn.feature_extraction</a><details open="open"><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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  <section id="module-sklearn.feature_extraction">
<span id="sklearn-feature-extraction"></span><span id="feature-extraction-ref"></span><h1>sklearn.feature_extraction<a class="headerlink" href="#module-sklearn.feature_extraction" title="Link to this heading">#</a></h1>
<p>Feature extraction from raw data.</p>
<p><strong>User guide.</strong> See the <a class="reference internal" href="../modules/feature_extraction.html#feature-extraction"><span class="std std-ref">Feature extraction</span></a> section for further details.</p>
<div class="pst-scrollable-table-container"><table class="autosummary longtable table autosummary">
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.DictVectorizer.html#sklearn.feature_extraction.DictVectorizer" title="sklearn.feature_extraction.DictVectorizer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DictVectorizer</span></code></a></p></td>
<td><p>Transforms lists of feature-value mappings to vectors.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.FeatureHasher.html#sklearn.feature_extraction.FeatureHasher" title="sklearn.feature_extraction.FeatureHasher"><code class="xref py py-obj docutils literal notranslate"><span class="pre">FeatureHasher</span></code></a></p></td>
<td><p>Implements feature hashing, aka the hashing trick.</p></td>
</tr>
</tbody>
</table>
</div>
<section id="module-sklearn.feature_extraction.image">
<span id="from-images"></span><span id="feature-extraction-ref-from-images"></span><h2>From images<a class="headerlink" href="#module-sklearn.feature_extraction.image" title="Link to this heading">#</a></h2>
<p>Utilities to extract features from images.</p>
<div class="pst-scrollable-table-container"><table class="autosummary longtable table autosummary">
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.image.PatchExtractor.html#sklearn.feature_extraction.image.PatchExtractor" title="sklearn.feature_extraction.image.PatchExtractor"><code class="xref py py-obj docutils literal notranslate"><span class="pre">image.PatchExtractor</span></code></a></p></td>
<td><p>Extracts patches from a collection of images.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.image.extract_patches_2d.html#sklearn.feature_extraction.image.extract_patches_2d" title="sklearn.feature_extraction.image.extract_patches_2d"><code class="xref py py-obj docutils literal notranslate"><span class="pre">image.extract_patches_2d</span></code></a></p></td>
<td><p>Reshape a 2D image into a collection of patches.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.image.grid_to_graph.html#sklearn.feature_extraction.image.grid_to_graph" title="sklearn.feature_extraction.image.grid_to_graph"><code class="xref py py-obj docutils literal notranslate"><span class="pre">image.grid_to_graph</span></code></a></p></td>
<td><p>Graph of the pixel-to-pixel connections.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.image.img_to_graph.html#sklearn.feature_extraction.image.img_to_graph" title="sklearn.feature_extraction.image.img_to_graph"><code class="xref py py-obj docutils literal notranslate"><span class="pre">image.img_to_graph</span></code></a></p></td>
<td><p>Graph of the pixel-to-pixel gradient connections.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.image.reconstruct_from_patches_2d.html#sklearn.feature_extraction.image.reconstruct_from_patches_2d" title="sklearn.feature_extraction.image.reconstruct_from_patches_2d"><code class="xref py py-obj docutils literal notranslate"><span class="pre">image.reconstruct_from_patches_2d</span></code></a></p></td>
<td><p>Reconstruct the image from all of its patches.</p></td>
</tr>
</tbody>
</table>
</div>
</section>
<section id="module-sklearn.feature_extraction.text">
<span id="from-text"></span><span id="feature-extraction-ref-from-text"></span><h2>From text<a class="headerlink" href="#module-sklearn.feature_extraction.text" title="Link to this heading">#</a></h2>
<p>Utilities to build feature vectors from text documents.</p>
<div class="pst-scrollable-table-container"><table class="autosummary longtable table autosummary">
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.text.CountVectorizer.html#sklearn.feature_extraction.text.CountVectorizer" title="sklearn.feature_extraction.text.CountVectorizer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">text.CountVectorizer</span></code></a></p></td>
<td><p>Convert a collection of text documents to a matrix of token counts.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.text.HashingVectorizer.html#sklearn.feature_extraction.text.HashingVectorizer" title="sklearn.feature_extraction.text.HashingVectorizer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">text.HashingVectorizer</span></code></a></p></td>
<td><p>Convert a collection of text documents to a matrix of token occurrences.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.text.TfidfTransformer.html#sklearn.feature_extraction.text.TfidfTransformer" title="sklearn.feature_extraction.text.TfidfTransformer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">text.TfidfTransformer</span></code></a></p></td>
<td><p>Transform a count matrix to a normalized tf or tf-idf representation.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="../modules/generated/sklearn.feature_extraction.text.TfidfVectorizer.html#sklearn.feature_extraction.text.TfidfVectorizer" title="sklearn.feature_extraction.text.TfidfVectorizer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">text.TfidfVectorizer</span></code></a></p></td>
<td><p>Convert a collection of raw documents to a matrix of TF-IDF features.</p></td>
</tr>
</tbody>
</table>
</div>
</section>
</section>


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