><li><span class="tocitem">User Guide</span><ul><li><a class="tocitem" href="../getting_started/">Getting Started</a></li><li><a class="tocitem" href="../core_concepts/">Core Concepts</a></li><li class="is-active"><a class="tocitem" href>Data Preprocessing</a><ul class="internal"><li><a class="tocitem" href="#Scaling"><span>Scaling</span></a></li><li><a class="tocitem" href="#Encoding"><span>Encoding</span></a></li><li><a class="tocitem" href="#Imputation"><span>Imputation</span></a></li><li><a class="tocit