s="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">vstack</span><span class="p">(</span><span class="n">conditional_mean</span><span class="p">)</span>
            <span class="n">conditional_var</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">vstack</span><span class="p">(</span><span class="n">conditional_var</span><span class="p">)</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="c1">#