Standardization before PCA with data in same units and similar interval?
6316
PCA on correlation or covariance?
9663
Is it a good practice to always scale/normalize data for machine learning?
10479
How to simulate data that satisfy specific constraints such as having specific mean and standard deviation?
73181
Standard deviation of binned observations
143908
What are "rotated" and "unrotated" principal components, given that PCA always rotates the coordinates axes?
104142
How to choose significance level for a large data set?
57565
Scaling data that are on different orders of magnitude for plotting
25535
Categorical Principal Component Analysis - using Count, Continuous, Ordinal variables together
77851
Should we apply normalization to test data as well?
156944
Is there a test/technique/method for comparing principal components decompositions between samples?
116362
Is PCA unstable under multicollinearity?
116179
Is principal component regression (PCR) using principal component scores for regression?
81645
Combining PCA, feature scaling, and cross-validation without training-test data leakage
14465
"Normalizing" variables for SVD / PCA
13787
Why log-transforming the data before performing principal component analysis?
27227
Does standardising independent variables reduce collinearity?
22203
Data normalization and standardization in neural networks