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Dr. Andrew Ng's UFLDL Tutorial(http://ufldl.stanford.edu/wiki/index.php/UFLDL_Tutorial) is a great tutorial for learning neural network and deep learning techniques. It provies exercises in different areas. When I began the exercises, I found that it would be beneficial to have "answers" for comparation to ensure what I have programmed is correct. However, it is difficult to find appropriate sources. Therefore, I share my codes, aiming to provide some references for those who are very interested in learning Dr. Andrew Ng's tutorial. I cannot promise the code is 100% correct; I see it as an alternative reference for your benefits.
There is another related git repository: https://github.com/danluu/UFLDL-tutorial
If you have any questions, please contact me. (johnny5550822@gmail.com).
I am working on clean-up and comments currently. Hope it helps!