index_sorensen: Dice-Sorensen Qualitative Index

In tesselle/tabula: Analysis and Visualization of Archaeological Count Data

Dice-Sorensen Qualitative Index

Description

Dice-Sorensen Qualitative Index

Usage

index_sorensen(x, y, ...)

## S4 method for signature 'logical,logical'
index_sorensen(x, y)

## S4 method for signature 'numeric,numeric'
index_sorensen(x, y)

Arguments

x, y	A numeric vector.
...	Currently not used.

Details

Data are standardized on a presence/absence scale (0/1) beforehand.

Value

A numeric vector.

Author(s)

N. Frerebeau

References

Dice, L. R. (1945). Measures of the Amount of Ecologic Association Between Species. Ecology, 26(3): 297-302. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.2307/1932409")}

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. Kongelige Danske Videnskabernes Selskab, 5(4): 1-34.

See Also

Other beta diversity measures: index_binomial(), index_brainerd(), index_bray(), index_cody(), index_jaccard(), index_morisita(), index_routledge, index_whittaker(), index_wilson()

tesselle/tabula documentation built on June 15, 2025, 12:08 a.m.