Is principal component analysis unsupervised?

Related questions

1. What is PCA analysis used for?
2. How does PCA reduced dimensionality?
3. What is PCA explained variance?
4. Is PCA linear or nonlinear?
5. Why is PCA linear?
6. What is supervised PCA?
7. Is PCA a linear model?
8. What is PCA method?
9. How is PCA used in pattern recognition?
10. What is pc1 in PCA?

Tags

1. #component
2. #unsupervised
3. #datasets
4. #principal
5. #still
6. #reduce
7. #learn
8. #structure
9. #inherent
10. #original
11. #relationships
12. #while
13. #accurate
14. #preserving
15. #preprocess
16. #dimensional
17. #machine
18. #dataset
19. #learning
20. #technique
21. #models
22. #analysis
23. #dimensionality