plex
   training, use the <code>network.train()</code> function. The arguments for
   this function are:</p>
<pre>
myNetwork.propagate(rate, momentum, update, target);
</pre>

<p>Where target is optional. The default value of momentum is <code>0</code>. Read more about
momentum on the <a href="../../methods/regularization/">regularization page</a>. If you run
propagation without setting update to true, then the weights won't update. So if
you run propagate 3x with <code>update: false</code>, and then 1x wit