This topic created in 1566 days ago, the information mentioned may be changed or developed.
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leimao Feb 23, 2022
建议自己推导一遍 PCA 你就会明白了：
https://leimao.github.io/article/Principal-Component-Analysis/ |
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huzhikuizainali OP @leimao 我看的就是 pca 的章节。
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leimao Feb 23, 2022
老坐标在新坐标系投影之后，坐标会变，方差也会变。
建议你理解一下我的 notes： https://leimao.github.io/article/Principal-Component-Analysis/#Mathematics-of-Principal-Components-Analysis |
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