// TODO(ariw): Delete any matrix creation in layer operations.
func (self *Layer) Forward(previous *Layer) {
self.resetForExamples(previous)
self.Input = previous.Output
var inputAndBias mat64.Dense
inputAndBias.Augment(self.Input, self.Ones) // Add bias to input.
self.Output.Mul(&inputAndBias, self.Weight)
self.DActivationFunction(self.Output.T(), self.Derivatives)
self.ActivationFunction(self.Output, self.Output)
}