May 25, 2018
2:39 a.m.
Hello all, I wonder is it necessary or correct to do z score transformation before PCA? I didn't see any preprocessing for face image in the example of Faces recognition example using eigenfaces and SVMs, link: http://scikit-learn.org/stable/auto_examples/applications/plot_face_recognit... I am doing on a similar dataset and got a weird result if I standardized data before PCA. The components figure will have a strong gradient and it doesn't make any sense. Any ideas about the reason? Thanks.
2896
Age (days ago)
2899
Last active (days ago)
6 comments
3 participants
participants (3)
-
James Melenkevitz -
Michael Eickenberg -
Shiheng Duan