Feature dimensionality reduction methods: PCA, LDA

Reprint two articles, the writing is very thorough, master.

PCA:https://www.cnblogs.com/pinard/p/6239403.html

LDA : https://www.cnblogs.com/pinard/p/6244265.html

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Origin blog.csdn.net/gbz3300255/article/details/108882886