>
<dd><p>A numeric scalar. The size of sample required.</p></dd>


<dt>alpha</dt>
<dd><p>A numeric vector.  Dirichlet concentration parameter.</p></dd>

</dl></div>
    <div id="value">
    <h2>Value</h2>
    

<p>An <code>n</code> by <code>length(alpha)</code> numeric matrix.</p>
    </div>
    <div id="details">
    <h2>Details</h2>
    <p>The simulation is based on the property that if
  \(Y_1, \ldots, Y_K\) are independent, \(Y_i\) has a
  gamma(\(\alpha_i\), 1) distribution and
  \(S = Y_1 + \cdots + Y