://dplyr.tidyverse.org" class="external-link">dplyr</a></span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="co"># Dataframe example</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/utils/data.html" class="external-link">data</a></span><span class="op">(</span><span class="va">NOAA_df_1990</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">Tmax</span> <span class="op">&lt;-</span> <span class="fu"><a