<p>In <a href="https://github.com/mlpack/mlpack/pull/686#discussion_r69394982">src/mlpack/methods/ne/genome.hpp</a>:</p>
<pre style='color:#555'>&gt; +        ssize_t fromNeuronIdx = GetNeuronIndex(aLinkGenes[i].FromNeuronId());
&gt; +        double input = aNeuronGenes[toNeuronIdx].Input() + 
&gt; +                       aNeuronGenes[fromNeuronIdx].Activation() * aLinkGenes[i].Weight();
&gt; +        aNeuronGenes[toNeuronIdx].Input(input);
&gt; +        
&gt; +        if (i == NumLink() - 1) {
&gt; +          aNeuronGenes[toNeuronIdx].CalcActivation();
&gt; +        } else if (GetNeuronIndex(aLinkGenes[i + 1].ToNeuronId()) != toNeuronIdx) {
&gt; +          aNeuronGenes[toNeuronIdx].CalcActivation();
&gt; +        }
&gt; +      }
&gt; +    }
&gt; +  }
&gt; +
&gt; +  // Get output vector.
&gt; +  std::vector&lt;double&gt; Output() {
</pre>
<p>Revised.</p>

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