an><span class="n">y_val</span><span class="o">.</span><span class="n">numpy</span><span class="p">(),</span> <span class="s1">&#39;--&#39;</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s2">&quot;Observed&quot;</span><span class="p">)</span>
            <span class="n">ax</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">legend</span><span class="p">()</span>

            <span class="n">ax