">n</span><span class="p">)</span> <span class="o">*</span> <span class="n">s</span><span class="o">.</span><span class="n">dx</span>
    <span class="k">if</span> <span class="n">separate</span> <span class="o">==</span> <span class="kc">True</span><span class="p">:</span>
        <span class="k">return</span> <span class="n">E_xc</span><span class="p">,</span> <span class="n">E_x</span><span class="p">,</span> <span class="n">E_c</span>
    <span class="k">else</span><span class="p">:</span>
        <span