降维处理，在实际问题的研究中，往往会涉及众多有关的变量。但是，变量太多不但会增加计算的复杂性，而且也会给合理地分析问题和解释问题带来困难。一般说来，虽然每个变量都提供了一定的信息，但其重要性有所不同，而在很多情况下，变量间有一定的相关性，从

Packet : 主成分分析[Matlab版].txt filelist

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