cov:协方差,对两个变量同时变化的度量(Covariance indicates the level to which two variables vary together),numpy.cov
https://www.cnblogs.com/terencezhou/p/6235974.html
Cross-validation:
PCR:Principal Components Regression
cov:协方差,对两个变量同时变化的度量(Covariance indicates the level to which two variables vary together),numpy.cov
https://www.cnblogs.com/terencezhou/p/6235974.html
Cross-validation:
PCR:Principal Components Regression