PCA

Posted 2020-10-13 魔都浪子

https://zh.wikipedia.org/wiki/%E5%8D%8F%E6%96%B9%E5%B7%AE%E7%9F%A9%E9%98%B5

http://www.visiondummy.com/2014/04/geometric-interpretation-covariance-matrix/

http://pinkyjie.com/2010/08/31/covariance/

https://en.wikipedia.org/wiki/Variance

https://deeplearning4j.org/eigenvector#a-beginners-guide-to-eigenvectors-pca-covariance-and-entropy

https://stats.stackexchange.com/questions/2691/making-sense-of-principal-component-analysis-eigenvectors-eigenvalues/140579#140579

https://math.stackexchange.com/questions/24456/matrix-multiplication-interpreting-and-understanding-the-process/24469#24469

http://blog.csdn.net/watkinsong/article/details/8234766

http://blog.csdn.net/watkinsong/article/details/38536463