李航老师的统计学习，对于学习机器学习挺有用的，尤其是理由一些算法的思想，希望能帮到大家。(Teacher Li Hang's statistics study, hoped that can help everybody)

机器学习算法，介绍各种机器学习算法，理论公式推导等等(Machine Learning Algorithms, Introduction to Various Machine Learning Algorithms, Derivation of Theoretical Formulas, and More)