to be vectors or row vectors (or to mix the two types). The density functions are also vectorized, so they allow arrays of row vectors or vectors as arguments; see section <a href="../functions-reference/conventions_for_probability_functions.html#prob-vectorization">vectorized function signatures</a> for a description of vectorization.</p>
<a id="index-entry-912dbafe0e9fce423e5413cf88d46731b610742d" class="index-entry"></a> <!-- real; dirichlet_lpdf; (vectors theta | vectors alpha); -->
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<p><code>rea