an><span class="n">line</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_dataFrame</span><span class="p">,</span> <span class="n">x</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_dataFrame</span><span class="p">[</span><span class="n">xColumn</span><span class="p">],</span> <span class="n">y</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_dataFrame</span><s