an><span class="mi">1</span><span class="p">:</span><span class="mi">2</span><span class="p">,:)</span> <span class="p">=</span> <span class="n">f_</span><span class="p">(</span><span class="mi">1</span><span class="p">:</span><span class="mi">2</span><span class="p">,:)</span> <span class="o">+</span> <span class="mi">1</span> <span class="p">;</span>
<span class="p">[</span><span class="n">r</span><span class="p">,</span><span class="n">f</span><span class="p">]</span> <span class="p">=</span> <span class