n> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">std</span><span class="p">(</span><span class="n">dataset</span><span class="p">[:,</span> <span class="n">i</span><span class="p">])</span>

            <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pm</span><span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="n">i</span><span class="p">]</span> <span class="o">&lt;</span> <span class