Is the sign of principal components meaningless?
8333
Does the sign of scores or of loadings in PCA or FA have a meaning? May I reverse the sign?
156166
PCA of non-Gaussian data
91668
Sign of Estimate (Coefficient) of Interaction Terms
3589
How to reverse PCA and reconstruct original variables from several principal components?
130389
Does non-zero correlation imply dependence?
123573
Is a sample covariance matrix always symmetric and positive definite?
116362
Is PCA unstable under multicollinearity?
27227
Does standardising independent variables reduce collinearity?
55662
How to use principal components analysis to select variables for regression?
49582
How to visualize what canonical correlation analysis does (in comparison to what principal component analysis does)?
63042
What are the differences between Factor Analysis and Principal Component Analysis?
17620
Why the principal value of complex number argument is taken within $(-\pi,\pi]?$
84575
How do you interpret a significant but weak correlation?
24459
Why does correlation matrix need to be positive semi-definite and what does it mean to be or not to be positive semi-definite?
89237
PCA: Eigenvectors of opposite sign and not being able to compute eigenvectors with `solve` in R
34036
Positive correlation and negative regressor coefficient sign
112134
What are principal component scores?