<p>In <a href="https://github.com/mlpack/mlpack/pull/753#discussion_r76695131">src/mlpack/tests/ne_test.cpp</a>:</p>
<pre style='color:#555'>&gt; +  Parameters params;
&gt; +  params.speciesSize = 500;
&gt; +  params.mutateRate = 0.1;
&gt; +  params.mutateSize = 0.02;
&gt; +  params.elitePercentage = 0.2;
&gt; +  params.maxGeneration = 5000;
&gt; +
&gt; +  // Construct seed genome for xor task.
&gt; +  int id = 0;
&gt; +  int numInput = 3;
&gt; +  int numOutput = 1;
&gt; +  double fitness = -1;
&gt; +  std::vector&lt;NeuronGene&gt; neuronGenes;
&gt; +  std::vector&lt;LinkGene&gt; linkGenes;
&gt; +
&gt; +  NeuronGene inputGene1(0, INPUT, LINEAR, 0, std::vector&lt;double&gt;(), 0, 0);
</pre>
<p>Do you think, we could set a default argument for the  <code>coordinate</code>parameter. That way we don't have to specify <code>std::vector&lt;double&gt;()</code> every time we create a new NeuronGene.</p>

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