Is it acceptable to reverse a sign of a principal component score?
8333
Does the sign of scores or of loadings in PCA or FA have a meaning? May I reverse the sign?
129169
Transforming positively skewed data with positive and negative values
42297
Minimum sample size for PCA or FA when the main goal is to estimate only few components?
21224
Applying PCA to data that fail a normality test
154899
Is it valid to perform PCA if Kaiser-Meyer-Olkin (KMO) index is very low?
14181
Can averaging all the variables be seen as a crude form of PCA?
85693
How to reverse the direction of the y axes
133683
Skewness transformation for one but not the other variable?
7328
The proof of shrinking coefficients using ridge regression through "spectral decomposition"
82178
Does it make sense to combine PCA and LDA?
24814
Is PCA still done via the eigendecomposition of the covariance matrix when dimensionality is larger than the number of observations?
89237
PCA: Eigenvectors of opposite sign and not being able to compute eigenvectors with `solve` in R
85031
How to interpret this PCA biplot to determine which attributes to pick?
22551
What can cause PCA to worsen results of a classifier?
103877
The advantages and disadvantages of using Kaiser Rule to select the number of principal components
13787
Why log-transforming the data before performing principal component analysis?
109090
Inverting non positive definite covariance matrix