"op">=</span> <span class="st">'Iteration'</span>,</span></span>
<span class="r-in"><span>     main <span class="op">=</span> <span class="st">'Trace Plot'</span>,</span></span>
<span class="r-in"><span>     ylab <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/substitute.html" class="external-link">substitute</a></span><span class="op">(</span><span class="va">Sigma</span><span class="op">[</span><span class="va">k</span><span class="op">]</span><span class="op">[</span><span clas