主元分析，主要用于多维数据的降维处理，能够从多维数据中提取出最主要的元素，从线性变换的角度来说就是坐标表换到一个能够体现系统特征的基座标系上-Principal component analysis, multidimensional data is mainly used for dimension reduction process, multi-dimensional data can be extracted from the most important elements, from the point of view is the linear transformation of coordinates for the system to reflect the characteristics of a standard system on the base