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<!DOCTYPE html>
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<meta name="description" content="Skrub provides various transformers that help with feature engineering numeric, datetime and categorical data. The encoders covered in this section convert the raw features found in an input datafr..." />
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<section id="column-level-feature-extraction">
<span id="user-guide-encoders-index"></span><h1>Column-level feature extraction<a class="headerlink" href="#column-level-feature-extraction" title="Link to this heading">#</a></h1>
<p>Skrub provides various transformers that help with feature engineering numeric,
datetime and categorical data. The encoders covered in this section convert the
raw features found in an input dataframe into numeric features that can be used
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<li class="toctree-l1"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_categorical.html">Encoding string and text columns as numeric features</a><ul>
<li class="toctree-l2"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_categorical.html#comparing-the-categorical-encoders-included-in-skrub">Comparing the categorical encoders included in skrub</a></li>
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<li class="toctree-l1"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_datetimes.html">Handling datetimes: parsing from strings and encoding as numbers</a><ul>
<li class="toctree-l2"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_datetimes.html#parsing-datetime-strings-with-todatetime">Parsing Datetime Strings with <code class="xref py py-class docutils literal notranslate"><span class="pre">ToDatetime</span></code></a><ul>
<li class="toctree-l3"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_datetimes.html#dealing-with-time-zones">Dealing with Time zones</a></li>
<li class="toctree-l3"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_datetimes.html#caveats-when-dealing-with-month-first-day-first-conventions">Caveats when dealing with month first/day first conventions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="modules/column_level_featurizing/feature_engineering_datetimes.html#encoding-and-feature-engineering-with-datetimeencoder">Encoding and Feature Engineering with <code class="xref py py-class docutils literal notranslate"><span class="pre">DatetimeEncoder</span></code></a></li>
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<li class="toctree-l1"><a class="reference internal" href="modules/column_level_featurizing/robust_scaling.html">Robust scaling of numeric features using <code class="xref py py-class docutils literal notranslate"><span class="pre">SquashingScaler</span></code></a></li>
<li class="toctree-l1"><a class="reference internal" href="modules/column_level_featurizing/advanced_columnwise_operations.html">Advanced columnwise operations</a><ul>
<li class="toctree-l2"><a class="reference internal" href="modules/column_level_featurizing/advanced_columnwise_operations.html#the-single-column-transformer">The single column transformer</a></li>
<li class="toctree-l2"><a class="reference internal" href="modules/column_level_featurizing/advanced_columnwise_operations.html#rejection-handling-with-applytocols-and-rejectcolumn">Rejection handling with <code class="xref py py-class docutils literal notranslate"><span class="pre">ApplyToCols</span></code> and <code class="xref py py-class docutils literal notranslate"><span class="pre">core.RejectColumn</span></code></a></li>
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