"</span><span class="op">)</span>,</span>
<span>  size <span class="op">=</span> <span class="fl">1</span>, alpha <span class="op">=</span> <span class="fl">0.8</span>,</span>
<span>  theme <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><span class="st">'standard'</span>, <span class="st">'catalog'</span>, <span class="st">'metro'</span>,</span>
<span>                <span class="st">'pastel'</span>, <span class="