<p>In <a href="https://github.com/mlpack/mlpack/pull/751#discussion_r73780120">src/mlpack/core/dists/gamma_distribution.cpp</a>:</p>
<pre style='color:#555'>&gt; +  // Compute denominator only once for each dimension.
&gt; +  arma::vec denominators(alpha.n_elem);
&gt; +  for (size_t d = 0; d &lt; alpha.n_elem; ++d)
&gt; +    denominators(d) = std::tgamma(alpha(d)) * std::pow(beta(d), alpha(d));
&gt; +
&gt; +  // Compute probability of each observation.
&gt; +  for (size_t i = 0; i &lt; numObs; ++i)
&gt; +  {
&gt; +    for (size_t d = 0; d &lt; observations.n_rows; ++d)
&gt; +    {
&gt; +      // Compute probability using Multiplication Law and Logarithm addition
&gt; +      // property.
&gt; +      LogProbabilities(i) += std::log( 
&gt; +        std::pow(observations(d, i), alpha(d) - 1) 
&gt; +        * std::exp(-observations(d, i) / beta(d)) 
&gt; +        / denominators(d));
</pre>
<p>Same comment about indentation and readability applies here.</p>

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