<p>In <a href="https://github.com/mlpack/mlpack/pull/686#discussion_r70904440">src/mlpack/methods/ne/neat.hpp</a>:</p>
<pre style='color:#555'>> + void InitPopulation() {
> + aPopulation = Population(aSeedGenome, aPopulationSize);
> + }
> +
> + // Reproduce next generation of population.
> + void Reproduce() {
> + // keep best genome.
> + Genome lastBestGenome = aPopulation.BestGenome();
> +
> + // Remove stale species.
> + if (aPopulation.aSpecies.size() > 10) {
> + RemoveStaleSpecies(aPopulation);
> + }
> +
> + // Remove weak genomes in each species.
> + CullSpecies(aPopulation, aCullSpeciesPercentage);
</pre>
<p>I referred to this implementation which seems performs good on Mario game:<br>
<a href="http://pastebin.com/ZZmSNaHX">http://pastebin.com/ZZmSNaHX</a><br>
And truncating species by 50%, or by only one left are also come from this.<br>
Actually I am now in the progress of reviewing other implementation ideas, such as the neat-python. The NEAT's implementation seems are all quite different for different packages. I am trying to come up with a progress which combines the goodness of different packages.</p>
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