> For the complete documentation index, see [llms.txt](https://joyous-x.gitbook.io/mbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://joyous-x.gitbook.io/mbook/part-bigdata/catalog-1/pca-yuan-li-tui-dao.md).

# PCA原理推导