[交流] 【求教】Multivariate techniques such Principal Component Analysis (PCA) 已有1人参与

Multivariate techniques such Principal Component Analysis (PCA) was employed to extract useful information from the spectral data set. PCA is essentially a descriptive method. The main goals of this procedure are to find relationships between the different parameters (objects and vari- ables) and to detect possible clusters or trends within objects and/or variables.请问各位前辈，这个pca是什么方法？给个参考文献可以吗？下面是pca方法得到的两个图

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