Data normalization prior to PCA?
6316
PCA on correlation or covariance?
70917
What's the difference between principal component analysis and multidimensional scaling?
45832
What is the relation between k-means clustering and PCA?
45858
How to compute varimax-rotated principal components in R?
46319
How to perform orthogonal regression (total least squares) via PCA?
11188
Can principal component analysis be applied to datasets containing a mix of continuous and categorical variables?
115584
Dataset transformation for clustering after PCA
10466
Making sense of principal component analysis, eigenvectors & eigenvalues
9663
Is it a good practice to always scale/normalize data for machine learning?
157062
Dimensionality reduction (SVD or PCA) on a large, sparse matrix
21224
Applying PCA to data that fail a normality test
81049
What norm of the reconstruction error is minimized by the low-rank approximation matrix obtained with PCA?
24814
Is PCA still done via the eigendecomposition of the covariance matrix when dimensionality is larger than the number of observations?
77851
Should we apply normalization to test data as well?
7632
Interpretation of biplots in principal components analysis
126886
Do the principal components change if we apply PCA more than once (recursively) on data?
113346
What is the proper association measure of a variable with a PCA component (on a biplot / loading plot)?