ha and prior failures (plus one) beta</p>
<small><i>Available since 2.12</i></small>
<a id="index-entry-447854f88734efbef65bc89140a035fe0f16cc74" class="index-entry"></a> <!-- R; beta_rng; (reals alpha, reals beta); -->
<p></p>
<p><code>R</code> <strong><code>beta_rng</code></strong><code>(reals alpha, reals beta)</code><br> Generate a beta variate with positive prior successes (plus one) alpha and prior failures (plus one) beta; may only be used in transformed data and generated quantities blocks. For a de