【DeepLearning】UFLDL tutorial错误记录

（一）Autoencoders and Sparsity章节公式错误：

s2 应为 s3。

意为从第2层（隐藏层）i节点到输出层j节点的误差加权和。

（二）Support functions for loading MNIST in Matlab文件名错误

% Change the filenames if you've saved the files under different names
% On some platforms, the files might be saved as 
% train-images.idx3-ubyte / train-labels.idx1-ubyte
images = loadMNISTImages('train-images-idx3-ubyte');
labels = loadMNISTLabels('train-labels-idx1-ubyte');
 
% We are using display_network from the autoencoder code
display_network(images(:,1:100)); % Show the first 100 images
disp(labels(1:10));

应为

images = loadMNISTImages('train-images.idx3-ubyte');
labels = loadMNISTLabels('train-labels.idx1-ubyte');