This topic created in 1541 days ago, the information mentioned may be changed or developed.
 | 1 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/ |
 | 2 huzhikuizainali OP @leimao 我看的就是 pca 的章节。 |
| 3 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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