包含特征值与特征向量的提取、训练样本以及最后的识别，包括最小二乘法、SVM、神经网络、1_k近邻法,主要为数据分析和统计。- Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Mainly for data analysis and statistics.