PCA scores in my own implementation have different sign from the ones computed in R
8333
Does the sign of scores or of loadings in PCA or FA have a meaning? May I reverse the sign?
156944
Is there a test/technique/method for comparing principal components decompositions between samples?
4244
How to compute PCA scores from eigendecomposition of the covariance matrix?
32282
Why I am getting different $R^2$ from R LM and manual calculation?
21410
Comparing and contrasting, p-values, significance levels and type I error
2632
PCA and the train/test split
9286
Questions on PCA: when are PCs independent? why is PCA sensitive to scaling? why are PCs constrained to be orthogonal?
44554
Combining randomForests in R, why are the err.rate, mse and rsq components NULL
7779
How does centering the data get rid of the intercept in regression and PCA?
116179
Is principal component regression (PCR) using principal component scores for regression?
145342
Why do the eigenvectors for two similar matrixes differ by a large amount
67557
Imputation of missing values for PCA
80568
Using wilcox.test() and t.test() in R yielding different p-values
70917
What's the difference between principal component analysis and multidimensional scaling?
126886
Do the principal components change if we apply PCA more than once (recursively) on data?
46319
How to perform orthogonal regression (total least squares) via PCA?
21224
Applying PCA to data that fail a normality test