an> <span class="n">theme</span><span class="o">=</span><span class="s1">&#39;solar&#39;</span><span class="p">,</span>
      <span class="n">xTitle</span><span class="o">=</span><span class="s1">&#39;Time&#39;</span><span class="p">,</span> <span class="n">yTitle</span> <span class="o">=</span> <span class="s1">&#39;Frequency&#39;</span><span class="p">,</span> <span class="n">zTitle</span><span class="o">=</span><span class="s2">&quot;log magnitude&quot;</span><span class="p">)</span>
  <span class="n">fi