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 an