>
    </div>

    <div id="ref-usage">
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">DAG</span><span class="op">(</span><span class="va">...</span>, order <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span></span></code></pre></div>
    </div>

    <div id="arguments">
    <h2>Arguments</h2>
    <dl><dt>...</dt>
<dd><p>a sequence of model formulae</p></dd>


<dt>order</dt>
<dd><p>logical, defaulting to <code>TRUE</code>. If <code>TRUE</code> t