ng. For example:</p>
<ul class="simple">
<li><p>Put some metadata columns from .obs into a .obsm key and use those features</p></li>
<li><p>Put some genes into a .obsm key and use those genes</p></li>
<li><p>Calculate a PCA embedding and use that</p></li>
<li><p>Directly on the raw counts, or normalized, or whatever you have in <code class="docutils literal notranslate"><span class="pre">.X</span></code>, just pass <code class="docutils literal notranslate"><span class="pre">feature_key='use_X'</span></code