N2VIS: An Interactive Visualization Tool for Neural Networks

We describe N 2 VIS, an interactive visualization tool for feedforward neural network populations trained through evolutionary computation. N 2 VIS provides vi-sualization of network attributes including topology, connection weights, weight volatility, and nodal activation levels for speciic input values, as well as of genealogical relationships between diierent networks. Changes to network parameters can be made interactively by the user during training, and their eeects are immediately visualized. These features contribute to making N 2 VIS an eeective visualization tool for designers , users, and students of neural networks.