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	用主成分分析法进行数值分类的一些问题
	周静芋¹, 宋世德¹, 袁志发¹
	西北农业大学基础科学系

摘要:

讨论用协方差阵（Σ）和相关阵（R）进行主成分分析的关系，并初步探套了用主成分分析进行数值分类选用协方差阵和相关阵时应注意的问题。

关键词: 主成分分析，数值分类，相关矩阵，协方差矩阵

DOI：

分类号:O212.4

基金项目:

Problems in Numerical Taxonomy with PCA

Zhou Jingyu Song Shide Yuan Zhifa,Zhou Jingyu Song Shide Yuan Zhifa,Zhou Jingyu Song Shide Yuan Zhifa

Abstract:

The relationship between PCA from the covariance matrix (Σ) and PCA from the correlation matrix (R) was discussed.And the problems in selection of whether covariance matrix or correlation matrix in numerical taxonomy with PCA were primarily studied.

Key words: principal component analysis,numerical taxonomy,correlation matrix, covariance matrix