Why do prcomp() and eigen(cov()) in R return different signs of PCA eigenvectors?
89237
PCA: Eigenvectors of opposite sign and not being able to compute eigenvectors with `solve` in R
70245
Why is the eigenvector in PCA taken to be unit norm?
154304
Do PCA affect different classification methods?
116362
Is PCA unstable under multicollinearity?
18487
Why are there only $n-1$ principal components for $n$ data if the number of dimensions is $\ge n$?
21224
Applying PCA to data that fail a normality test
14381
I'm getting "jumpy" loadings in rollapply PCA in R. Can I fix it?
36609
Creating a single index from several principal components or factors retained from PCA/FA
145396
Symmetric Matrix , Eigenvectors are not orthogonal to the same eigenvalue.
76740
Error parsing PCC subspaces from PCCT: ACPI PCC probe failed
37528
How to plot an ellipse from eigenvalues and eigenvectors in R?
112134
What are principal component scores?
93325
Difference In Eigenvectors
77307
Why does inversion of a covariance matrix yield partial correlations between random variables?
123573
Is a sample covariance matrix always symmetric and positive definite?
29408
Get Eigensystem to return orthogonal eigenvectors for Hermitian matrix
85010
What're the differences between PCA and autoencoder?