an class="kw">factor</span>(L1)),     <span class="dt">data=</span>limits, <span class="dt">alpha=</span><span class="fl">0.2</span>) <span class="op">+</span>
<span class="st">  </span><span class="kw">geom_path</span>(<span class="kw">aes</span>(x, value, <span class="dt">colour=</span><span class="kw">factor</span>(L1))) <span class="op">+</span>
<span class="st">  </span><span class="kw">scale_x_continuous</span>(<span class="st">&quot;x /nm&quot;</span>,<span class="dt">expand=</span><span class="kw">c