622249b881fc41605bf036fc4acba1d2e27" class="index-entry"></a> <!-- real; rayleigh ~; -->
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</section>
<section id="stan-functions-9" class="level3">
<h3 class="anchored" data-anchor-id="stan-functions-9">Stan functions</h3>
<a id="index-entry-b04b39e49861434e1dc33eaab453c14e28da9f01" class="index-entry"></a> <!-- real; rayleigh_lpdf; (reals y | reals sigma); -->
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<p><code>real</code> <strong><code>rayleigh_lpdf</code></strong><code>(reals y | reals sigma)</code><br> The log of the Rayleigh dens