%&nbsp;<span class=help_field>Example:</span></span><br>
<span class=help>%&nbsp;&nbsp;orig_data&nbsp;=&nbsp;load('vltava');
</span><br>
<span class=help>%&nbsp;&nbsp;map_data&nbsp;=&nbsp;qmap(orig_data);
</span><br>
<span class=help>%&nbsp;&nbsp;lin_model&nbsp;=&nbsp;perceptron(map_data);
</span><br>
<span class=help>%&nbsp;&nbsp;quad_model&nbsp;=&nbsp;lin2quad(lin_model);
</span><br>
<span class=help>%&nbsp;&nbsp;figure;&nbsp;ppatterns(orig_data);&nbsp;
</span><br>
<span class=help>%&nbsp;&nbsp;pboundary(