手法を比較

	t-SNE	主成分分析
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	2008	2002
提唱者	van der Maaten, L. & Hinton, G.	Jolliffe, I.T. (textbook); Pearson & Hotelling (origins)
種類	Nonlinear dimensionality reduction (manifold visualization)	Unsupervised dimensionality reduction
原典	van der Maaten, L. & Hinton, G. (2008). Visualizing Data using t-SNE. Journal of Machine Learning Research, 9(86), 2579–2605.	Jolliffe, I.T. (2002). Principal Component Analysis (2nd ed.). Springer.
別名	t-SNE (Boyut İndirgeme / Görselleştirme), t-distributed stochastic neighbor embedding, tsne	Temel Bileşenler Analizi (PCA), PCA, principal components analysis, Karhunen-Loève transform
関連	3	3
概要	t-SNE (t-Distributed Stochastic Neighbor Embedding) is a nonlinear dimensionality-reduction method introduced by Laurens van der Maaten and Geoffrey Hinton in 2008 that maps high-dimensional data into a 2D or 3D space for visualization. It preserves probabilistic local similarities, so points that are neighbours in the original space stay close together, revealing cluster structure and local neighbourhoods.	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.