><span class="va">sealevel</span><span class="op">)</span></span></code></pre></div>
<p><strong>Exercise 1.</strong> Examine Halifax sea-level variations
during Hurricane Juan, near the end of September, 2003.</p>
<p><strong>Exercise 2.</strong> Plot the de-tided Halifax sea level
during Autumn 2003, to see whether a surge associated with Hurricane
Juan is visible. (Hint: use <code>predict</code> with the results from
<code>tidem</code>.)</p>
</div>
<div class="section level2">
<h2 id="the-bivariate-case-cu