手法を比較

	ブレイ・カーティス距離（Bray-Curtis Dissimilarity）	キャンベラ距離
分野	意思決定	意思決定
系統	MCDM	MCDM
提唱年	1957	1967
提唱者	John Bray and John T. Curtis	Geoffrey Lance and William Williams
種類	Ecological community similarity measure	Normalized city-block distance
原典	Bray, J. R., & Curtis, J. T. (1957). An ordination of the upland forest communities of southern Wisconsin. Ecological Monographs, 27(4), 325-349.	Lance, G. N., & Williams, W. T. (1967). A general theory of classificatory sorting strategies. Computer Journal, 10(3), 271-277.
別名	Bray-Curtis index, Sorensen-Bray-Curtis, percentage difference	Canberra metric, normalized Manhattan distance
関連	3	1
概要	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.	Canberra distance is a weighted version of the Manhattan distance that normalizes differences by the sum of absolute values. Introduced by Geoffrey Lance and William Williams in 1967 as part of their work on clustering classification methods, this metric emphasizes differences in small values and is sensitive to changes in relative proportions. It is commonly used in taxonomy, ecology, decision-making, and any application where normalized relative differences matter.