span class="op">(</span><span class="st">"black"</span>,<span class="st">"red"</span><span class="op">)</span>,pch<span class="op">=</span><span class="fl">19</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/graphics/par.html" class="external-link">par</a></span><span class="op">(</span><span class="va">op</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="BassFL-1.png" alt="" width="700" height="433"></span>
<spa