/span>(count)) </span></code></pre></div>
<p>Another important and very powerful function from the <strong>dplyr</strong> package is <code>group_by()</code>: when a data set is grouped into subsets, we can apply any operation for each group <em>within a single data frame</em>. While you could nest those functions, the common approach within the tidyverse is the use of <em>pipes</em>. Pipes take the output of one function and send it directly to the next which avoids nested operations and allows for a more l