刚刚出炉的matlab代码，实现离散小波变换，进行主成分分析进行数据降维，用于模式识别，如temp识别，掌纹，表情，指纹，temp1等识别。

-Just-released matlab code to achieve the discrete wavelet transform, principal component analysis for data dimensionality reduction for pattern recognition, such as temp recognition, palm, face, fingerprint, temp1 and other identification.