里面有两个简单的主成分分析源代码，对于初学或想了解主成分分析算法的思想非常有帮助，简单易用。本人也是学习的其他同学的代码，不用于商业，仅供交流学习。-There are two simple principal component analysis of the source code for the beginner or want to know the thinking of principal component analysis algorithm is very helpful and easy to use. I am also learning other students in the code are not used for commercial purposes only exchange of learning.