So sánh phương pháp

	Phân tích tương quan chính tắc	Hồi quy Bình phương Tối thiểu Riêng phần (PLS)
Lĩnh vực	Thống kê	Học máy
Họ	Latent structure	Machine learning
Năm ra đời	1936	1975
Người khởi xướng	Harold Hotelling	Herman Wold; popularized by Svante Wold in chemometrics
Loại	Multivariate linear dimension reduction and association	Supervised latent-variable regression
Công trình gốc	Hotelling, H. (1936). Relations between two sets of variates. Biometrika, 28(3–4), 321–377.	Wold, S., Sjöström, M., & Eriksson, L. (2001). PLS-regression: a basic tool of chemometrics. Chemometrics and Intelligent Laboratory Systems, 58(2), 109–130.
Tên gọi khác	CCA, canonical variate analysis, canonical analysis, multiple canonical correlation	PLS regression, projection to latent structures, PLSR, kısmi en küçük kareler
Liên quan	4	3
Tóm tắt	Canonical Correlation Analysis (CCA) is a multivariate statistical method that identifies pairs of linear combinations — one from each of two variable sets — such that the correlation between each pair is maximised. Introduced by Harold Hotelling in his landmark 1936 Biometrika paper, CCA provides the most general linear framework for studying the association between two multivariate batteries of measurements, and many classical procedures (multiple regression, MANOVA, discriminant analysis) are special cases of it.	Partial least squares regression predicts a response from many, often highly collinear predictors by projecting them onto a small set of latent components — but, unlike principal components regression, it chooses those components to maximize their covariance with the response, not just the variance of the predictors. This supervised dimension reduction makes PLS a workhorse in chemometrics, spectroscopy, and other wide-data settings where predictors vastly outnumber observations.