">]</span>

<span class="c1"># selecting a random spectrum for visualisation purposes</span>
<span class="n">random_spectrum</span> <span class="o">=</span> <span class="n">cell_volume</span><span class="p">[</span><span class="mi">25</span><span class="p">,</span> <span class="mi">25</span><span class="p">,</span> <span class="mi">5</span><span class="p">]</span>
<span class="n">random_spectrum</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">title</span><spa