> <span class="cn">NULL</span>,</span>
<span>  clockratepr <span class="op">=</span> <span class="st">"prset clockratepr = fixed(1);"</span></span>
<span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
    <dl><dt>constraint</dt>
<dd><p>The constraint tree: a phylo object or a newick character string, with or without branch lengths.</p></dd>


<dt>taxa</dt>
<dd><