预备知识 在统计学中,方差是用来度量单个随机变量的离散程度,而协方差则一般用来衡量两个随机变量的联合变化程度。 方差 σ x 2 = 1 n − 1 ∑ i = 1 n ( x i − x ˉ ) 2 \sigma_{x}^{2}=\frac{1}{n-1} \sum_{i=1}^{n}\left(x_{i}-\bar{x}\right)^{2} σx2=n−11i=1∑n(xi−
1、导入模块 http://scikit-learn.org/stable/modules/generated/sklearn.discriminant_analysis.LinearDiscriminantAnalysis.html#sklearn.discriminant_analysis.LinearDiscriminantAnalysis from sklearn.discriminan