op">=</span> <span class="st">"black"</span>, linewidth <span class="op">=</span> <span class="fl">0.6</span></span>
<span>  <span class="op">)</span> <span class="op">+</span></span>
<span>  <span class="fu">ggplot2</span><span class="fu">::</span><span class="fu"><a href="https://ggplot2.tidyverse.org/reference/scale_manual.html" class="external-link">scale_linetype_manual</a></span><span class="op">(</span></span>
<span>    name   <span class="op">=</span> <span class="st">""</span>,</span>
<span>    val