stment in the second command. -->
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<p><strong>Abstract.</strong> The <code>oce</code> package makes it easy
to analyse univariate tidal signals, like sea level. Other software
offers solutions for bivariate signals, like the horizontal components
of water velocity. This vignette touches on both cases.</p>
<p><strong>FIXME</strong> the two citations below, somewhere in this
vignette.</p>
<div class="secti