是学习PCA特征提取的很好的学习资料，已调制信号计算其普相关密度，可以实现模式识别领域的数据的分类及回归，在matlab R2009b调试通过，真的是一个好程序。- Is a good learning materials to learn PCA feature extraction, Modulated signals to calculate its density Pu-related, You can achieve data classification and regression