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<section id="stan-functions-1" class="level3">
<h3 class="anchored" data-anchor-id="stan-functions-1">Stan functions</h3>
<a id="index-entry-6c7045c1cb405776f7ed13ebbb5da4b27240ea15" class="index-entry"></a> <!-- real; chi_square_lpdf; (reals y | reals nu); -->
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<p><code>real</code> <strong><code>chi_square_lpdf</code></strong><code>(reals y | reals nu)</code><br> The log of the Chi-square density of y given 