reference: https://www.amazon.com/Make-Your-Own-Neural-Network-ebook/dp/B01EER4Z4G Data: https://pjreddie.com/projects/mnist-in-csv/ training set: http://www.pjreddie.com/media/files/mnist_train.csv test set: http://www.pjreddie.com/media/files/mnist_test.csv Small data: Training: https://raw.githubusercontent.com/makeyourownneuralnetwork/makeyourownneuralnetwork/master/mnist_dataset/mnist_train_100.csv Test: https://raw.githubusercontent.com/makeyourownneuralnetwork/makeyourownneuralnetwork/master/mnist_dataset/mnist_test_10.csv