My dataset has only positive values. Why do I get some negative PCA scores?
8333
Does the sign of scores or of loadings in PCA or FA have a meaning? May I reverse the sign?
7779
How does centering the data get rid of the intercept in regression and PCA?
81645
Combining PCA, feature scaling, and cross-validation without training-test data leakage
107285
Why does a positively correlated variable have a negative coefficient in a multiple regression?
91025
How should I transform non-negative data including zeros?
99826
Error in `ezANOVA` with balanced dataset with no missing data
146263
Positive AND Negative reputation show as +-1
82605
Why are the number of false positives independent of sample size, if we use p-values to compare two independent datasets?
129169
Transforming positively skewed data with positive and negative values
67179
AUC and class imbalance in training/test dataset
139690
Which variables should I transform, center, and/or standardize in my data for Principal Component Analysis?
76740
Error parsing PCC subspaces from PCCT: ACPI PCC probe failed
3589
How to reverse PCA and reconstruct original variables from several principal components?
61215
Can ICC values be negative?
21224
Applying PCA to data that fail a normality test
64557
Which constant to add when applying 'Box-Cox transformation' to negative values?
6206
How does centering make a difference in PCA (for SVD and eigen decomposition)?