s://mc-stan.org/docs/functions-reference/simplex_distributions.html">view current version</a>.
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<section id="simplex-distributions" class="level1">
<h1>Simplex Distributions</h1>
<p>The simplex probabilities have support on the unit <span class="math inline">\(K\)</span>-simplex for a specified <span class="math inline">\(K\)</span>. A <span class="math inline">\(K\)</span>-dimensional vector <span class="math inline">\(\theta\)</span> is a unit <span class="math inline">\(K\)</span>-simplex if <s