pan class="kw">collapse</span> <span class="kw">=</span> <span class="st">""</span>, <span class="fu"><a href="https://rdrr.io/r/base/rep.html">rep</a></span>(<span class="st">"ab"</span>, <span class="no">N</span>)), <span class="kw">perl</span> <span class="kw">=</span> <span class="fl">TRUE</span>), <span class="kw">data.sizes</span> <span class="kw">=</span> <span class="fl">10</span>^<span class="fu"><a href="https://rdrr.io/r/base/seq.html">seq</a></span>(<span class="fl">1</span>, <span class="fl">5<