手法を比較

	K近傍法	多変量分散分析 (MANOVA)
分野	機械学習	統計学
系統	Machine learning	Hypothesis test
提唱年	1967	1932
提唱者	Cover, T.M. & Hart, P.E.	Samuel Stanley Wilks (Wilks' Lambda, 1932); Roy, Hotelling, Pillai (mid-20th c.)
種類	Instance-based (non-parametric) learning	Parametric multivariate mean comparison
原典	Cover, T.M. & Hart, P.E. (1967). Nearest Neighbor Pattern Classification. IEEE Transactions on Information Theory, 13(1), 21–27.	Tabachnick, B.G. & Fidell, L.S. (2013). Using Multivariate Statistics (6th ed.). Pearson. ISBN: 978-0205849574
別名	KNN, K-En Yakın Komşu (KNN), nearest neighbor classifier, instance-based learning	Multivariate ANOVA, Çok Değişkenli ANOVA (MANOVA)
関連	5	5
概要	K-Nearest Neighbors (KNN), formalized by Cover and Hart in 1967, is a non-parametric, instance-based method that classifies or predicts a new observation by looking at the k closest examples in the training data. For classification it takes a majority vote among those neighbors; for regression it averages their values.	MANOVA is a parametric hypothesis test that simultaneously compares group means across multiple continuous dependent variables, controlling the inflation of Type I error that would result from running separate ANOVAs. Key multivariate test statistics — Wilks' Lambda, Pillai's Trace, Hotelling-Lawley Trace, and Roy's Greatest Root — were developed between the 1930s and 1950s, with Wilks' Lambda formalised by Samuel Stanley Wilks in 1932.