手法を比較

	ソーレンセン・ダイス係数	ブレイ・カーティス距離（Bray-Curtis Dissimilarity）
分野	意思決定	意思決定
系統	MCDM	MCDM
提唱年	1945	1957
提唱者	Thorvald Sorensen and Lee Dice	John Bray and John T. Curtis
種類	Binary and compositional similarity measure	Ecological community similarity measure
原典	Sorensen, T. (1948). A method of establishing groups of equal amplitude in plant sociology based on similarity of species content and its application to analyses of the vegetation on Danish commons. Biologiske Skrifter, 5, 1-34.	Bray, J. R., & Curtis, J. T. (1957). An ordination of the upland forest communities of southern Wisconsin. Ecological Monographs, 27(4), 325-349.
別名	Dice coefficient, Czekanowski index, F1 similarity	Bray-Curtis index, Sorensen-Bray-Curtis, percentage difference
関連	1	3
概要	Sorensen-Dice coefficient, also called Dice coefficient or Czekanowski index, measures the similarity between two sets or samples based on presence and absence of attributes. Introduced independently by Thorvald Sorensen (1948) and Lee Dice (1945), this index ranges from 0 (completely dissimilar) to 1 (identical). It is particularly well-suited for binary presence-absence data and is the symmetric counterpart to the Bray-Curtis dissimilarity for abundance data.	Bray-Curtis dissimilarity is a quantitative measure of compositional difference between two samples, widely used in ecology and community analysis. Introduced by John Bray and John T. Curtis in 1957 for comparing forest communities, this index ranges from 0 (identical composition) to 1 (completely different). It is sensitive to abundance differences and is particularly effective for abundance data such as species counts, microbial populations, or preference intensities.