Backpropagation for Neural Network.
Reference: Martin T. Hagan, et al., Neural Networks Design, Chapter 11.
I present a two categories classification for a 2-4-2 neural network with backpropagation algorithm, the details of backpropagation algorithm can refer to Martin T. Hagan, et al., Neural Networks Design, Chapter 11.
Specifically, in the neural netwok, a sigmoid function is choiced as an activation function, and MSE is choiced as the loss function.
The results can be seen as follows: