an class="n">h_params</span><span class="p">%</span><span class="n">fRE_E_2D</span><span class="p">(</span><span class="n">rho_ind</span><span class="p">,</span><span class="nb">index</span><span class="p">)</span>
          <span class="n">g0</span> <span class="o">=</span> <span class="n">h_params</span><span class="p">%</span><span class="n">g</span><span class="p">(</span><span class="nb">index</span><span class="p">)</span>

          <span class="n">f1</span> <span class="o">=</span> <span class="n">h