Should PCA be fit on test set or only on training set
2632
PCA and the train/test split
11188
Can principal component analysis be applied to datasets containing a mix of continuous and categorical variables?
6590
PCA and proportion of variance explained
126340
Test Goodness of fit for FindFit
139690
Which variables should I transform, center, and/or standardize in my data for Principal Component Analysis?
154757
One component in PCA is always the mean vector in two-dimensions but not three
156166
PCA of non-Gaussian data
113346
What is the proper association measure of a variable with a PCA component (on a biplot / loading plot)?
135047
Why does PCA maximize total variance of the projection?
22551
What can cause PCA to worsen results of a classifier?
121204
Is it preferable to subset data to test specific hypotheses or specify a full model and run contrasts?
73962
Is it always better to use the whole dataset to train the final model?
103877
The advantages and disadvantages of using Kaiser Rule to select the number of principal components
55662
How to use principal components analysis to select variables for regression?
87472
Calculating ratio of sample data used for model fitting/training and validation
21224
Applying PCA to data that fail a normality test
44322
train_test_split() error: Found input variables with inconsistent numbers of samples