df(y | mu, sigma)</code>.</p>
<small><i>Available since 2.0</i></small>
<a id="index-entry-96de647c4a4c68e79cbd1680d0976df411556c5f" class="index-entry"></a> <!-- real; lognormal ~; -->
<p></p>
</section>
<section id="stan-functions" class="level3">
<h3 class="anchored" data-anchor-id="stan-functions">Stan functions</h3>
<a id="index-entry-ce67c5b635189c70cda3beeadc6fd4238ba2b535" class="index-entry"></a> <!-- real; lognormal_lpdf; (reals y | reals mu, reals sigma); -->
<p></p>
<p><code>real</code> <strong>