有详细的注释，包含特征值与特征向量的提取、训练样本以及最后的识别，采用偏最小二乘法，应用小区域方差对比，程序简单，一种噪声辅助数据分析方法。-There are detailed notes, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Partial least squares method, Application of small ar