observations exceed this threshold along with a significant positive
growth rate.</p>
</div>
<div class="section level3">
<h3 id="investigate-historical-estimates">Investigate historical estimates<a class="anchor" aria-label="anchor" href="#investigate-historical-estimates"></a>
</h3>
<p>The <code><a href="../reference/historical_summary.html">historical_summary()</a></code> function for
<code>tsd_onset</code> objects provides historical estimates from all
previous seasons. By utilising this function, it is