|) \\
\sigma &amp;= 6 \quad (\verb|sd|)
\end{aligned}
$$</span></p>
<p>The following chunk illustrates the fitting with Hessian computation
via <code>optim</code>:</p>
<div class="sourceCode" id="cb2"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va"><a href="https://jaimemosg.github.io/EstimationTools/">EstimationTools</a></span><span class="op">