Vertaile menetelmiä

	UMAP	Pääkomponenttianalyysi
Tieteenala	Koneoppiminen	Koneoppiminen
Menetelmäperhe	Machine learning	Machine learning
Syntyvuosi	2018	2002
Kehittäjä	McInnes, L.; Healy, J.; Melville, J.	Jolliffe, I.T. (textbook); Pearson & Hotelling (origins)
Tyyppi	Nonlinear manifold-learning dimension reduction	Unsupervised dimensionality reduction
Alkuperäislähde	McInnes, L., Healy, J. & Melville, J. (2018). UMAP: Uniform Manifold Approximation and Projection for Dimension Reduction. arXiv:1802.03426.	Jolliffe, I.T. (2002). Principal Component Analysis (2nd ed.). Springer.
Rinnakkaisnimet	UMAP (Uniform Manifold Approximation and Projection), uniform manifold approximation and projection, manifold dimension reduction	Temel Bileşenler Analizi (PCA), PCA, principal components analysis, Karhunen-Loève transform
Liittyvät	5	3
Tiivistelmä	UMAP (Uniform Manifold Approximation and Projection) is a fast, scalable nonlinear dimension-reduction method grounded in manifold-learning theory, introduced by McInnes, Healy and Melville in 2018. It compresses high-dimensional data into a low-dimensional embedding for visualisation and downstream analysis.	Principal Component Analysis (PCA) is an unsupervised dimensionality-reduction method — given its modern textbook treatment by Ian Jolliffe (2002) — that compresses high-dimensional data into fewer dimensions while preserving the maximum possible variance. It re-expresses correlated variables as a small set of uncorrelated principal components ordered by how much of the data's variation each one captures.