class="anchor" href="#examples"></a>Examples</h2>
    <pre class="examples"><div class='input'>
<span class='fu'><a href='https://rdrr.io/r/utils/data.html'>data</a></span>(<span class='no'>SPrail</span>)
<span class='co'># I want to identify observations at the route (origin-destination)/year level</span>
<span class='co'># Let's make it a character variable so we can tell at a glance what route we're talking</span>
<span class='no'>SPrail</span> <span class='kw'>&lt;-</span> <span class='no'>SPrail</span>