> <span class="op">~</span> <span class="st">"red"</span>,</span></span>
<span class="r-in"><span>  <span class="va">.</span> <span class="op"><a href="https://rdrr.io/r/base/match.html" class="external-link">%in%</a></span> <span class="va">letters</span> <span class="op">~</span> <span class="st">"green"</span>,</span></span>
<span class="r-in"><span>  <span class="va">.</span> <span class="op">&lt;</span> <span class="fl">0.5</span> <span class="op">~</span> <span class="st">"pink"</span></span></span>
<