Interpretation of all negative values in PCA
8333
Does the sign of scores or of loadings in PCA or FA have a meaning? May I reverse the sign?
76740
Error parsing PCC subspaces from PCCT: ACPI PCC probe failed
118103
Does PCA's reconstruction error get reduced with more PCs being used?
156166
PCA of non-Gaussian data
6316
PCA on correlation or covariance?
158823
Principal component analysis "backwards": how much variance of the data is explained by a given linear combination of the variables?
61215
Can ICC values be negative?
81049
What norm of the reconstruction error is minimized by the low-rank approximation matrix obtained with PCA?
111266
Function that returns $0$ for all negative values
129169
Transforming positively skewed data with positive and negative values
16523
How to compute classification accuracy of PCA?
6206
How does centering make a difference in PCA (for SVD and eigen decomposition)?
4244
How to compute PCA scores from eigendecomposition of the covariance matrix?
79763
What do empty (missing) values in the output of PCA or factor analysis mean in R?
17025
What exactly is called "principal component" in PCA?
36609
Creating a single index from several principal components or factors retained from PCA/FA
144185
Negative y value in polar plot