><span class="fl">50</span><span class="op">)</span>,</span>
<span>  mu      <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span>initial<span class="op">=</span><span class="fl">1.5</span>, lower<span class="op">=</span><span class="fl">0</span>, upper<span class="op">=</span><span class="fl">5</span><span class="op">)</span>,</span>
<span>  sigma_x <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/