="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
    <dl><dt>x</dt>
<dd><p>A vector of x (or longitude) coordinates.</p></dd>


<dt>y</dt>
<dd><p>A vector of y (or latitude) coordinates.</p></dd>


<dt>id</dt>
<dd><p>A vector corresponding to the unique identities of each track.</p></dd>


<dt>geo</dt>
<dd><p>A logical value indicating whether the locations are defined by 
geographic coordinates (pairs of longitude/latitude values). Default