">\[\begin{equation*}
\text{Rayleigh}(y|\sigma) = \frac{y}{\sigma^2} \exp(-y^2 / 2\sigma^2)
\!. \end{equation*}\]</span></p>
</section>
<section id="sampling-statement-9" class="level3">
<h3 class="anchored" data-anchor-id="sampling-statement-9">Sampling statement</h3>
<p><code>y ~</code> <strong><code>rayleigh</code></strong><code>(sigma)</code></p>
<p>Increment target log probability density with <code>rayleigh_lupdf(y | sigma)</code>.</p>
<small><i>Available since 2.0</i></small>
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