P weighting</span>
       <span class="n">rind</span><span class="o">=</span><span class="nb">FLOOR</span><span class="p">((</span><span class="n">rm</span><span class="p">(</span><span class="n">cc</span><span class="p">)</span><span class="o">-</span><span class="n">dr</span><span class="o">/</span><span class="mi">2</span><span class="p">)</span><span class="o">/</span><span class="n">dr</span><span class="p">)</span><span class="o">+</span><span class="mi">2_ip</span>
       <span class="n">Vpart</span>