an class="p">;</span>
</pre></div>


<p>We plot the region frames by</p>

<div class="highlight"><pre><span class="n">f</span> <span class="p">=</span> <span class="n">vl_ertr</span><span class="p">(</span><span class="n">f</span><span class="p">)</span> <span class="p">;</span>
<span class="n">vl_plotframe</span><span class="p">(</span><span class="n">f</span><span class="p">)</span> <span class="p">;</span>
</pre></div>


<p><code/><a href=../matlab/vl_ertr.html>vl_ertr</a></code> transposes the elliptica