span class="r-in"><span><span class="va">bn</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/subset.html" class="external-link">subset</a></span><span class="op">(</span><span class="va">babynames</span>, <span class="va">prop</span> <span class="op">&gt;=</span> <span class="fl">.01</span> <span class="op">&amp;</span> <span class="va">sex</span> <span class="op">==</span> <span class="st">"F"</span> <span class="op">&amp;</span> <span class="va">year</span> <span class