pca 主成分分析的matlab代码。主成分分析（Principal Component Analysis，PCA）， 是一种统计方法。通过正交变换将一组可能存在相关性的变量转换为一组线性不相关的变量，转换后的这组变量叫主成分。(PCA principal component analysis matlab code. Principal component analysis (Principal Component, Analysis, PCA) is a statistical method. Through orthogonal transform a group may be related to variable conversion is not related to a set of linear variables, this set of variables called principal component transformation.)