ector beta); -->
<p></p>
<p><code>real</code> <strong><code>poisson_log_glm_lpmf</code></strong><code>(int[] y | matrix x, vector alpha, vector beta)</code><br>
The log Poisson probability mass of <code>y</code> given the log-rate <code>alpha + x * beta</code>,
where an intercept <code>alpha</code> is used that is allowed to vary with the
different observations. The number of rows of the independent variable
matrix <code>x</code> needs to match the size of the dependent variable vector
<code>y</code> and <c