ss="pre">rat</span></tt> function with its
default tolerance of <span class="math">\(10^{-6}\)</span>. There is currently no way to
change this tolerance. See the
<a class="reference external" href="http://www.mathworks.com/help/techdoc/ref/rat.html">MATLAB documentation</a>
for the <tt class="docutils literal"><span class="pre">rat</span></tt> function for more details.</p>
<p>The complexity of the resulting model depends roughly on the size of the
values <span class="math">\(p_n\)</span> and <span class="