l2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre><code># S4 method for ROIVol,numeric,missing,ANY
[(x, i, j, drop)

# S4 method for ROIVol,logical,missing,ANY
[(x, i, j, drop)</code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
    <dl><dt>x</dt>
<dd><p>the object</p></dd>


<dt>i</dt>
<dd><p>first index</p></dd>


<d