ity of y given scale sigma</p>
<small><i>Available since 2.12</i></small>
<a id="index-entry-9778ca15ec9fc0fc7856485732abc302454e60c5" class="index-entry"></a> <!-- real; rayleigh_lupdf; (reals y | reals sigma); -->
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<p><code>real</code> <strong><code>rayleigh_lupdf</code></strong><code>(reals y | reals sigma)</code><br> The log of the Rayleigh density of y given scale sigma dropping constant additive terms</p>
<small><i>Available since 2.25</i></small>
<a id="index-entry-1a411f1904a7749524e9155b6695