Quantitative Kulczynski distance matrix

Description

Computes quantitative Kulczynski distances between the columns of an abundance matrix.

Usage

1
qkulczynski(regmat, log.distance=FALSE)

Arguments

regmat

(non-negative) abundance matrix. Columns are species, rows are regions.

log.distance

logical. If TRUE, 1 is added to the abundance matrix and then the logs of the values are taken in order to compute the distance.

Details

The quantitative Kulczynski distance between two species is 1-(mean of (mean of over regions minimum abundance of both species)/(sum of abundances of species 1) and (mean of over regions minimum abundance of both species)/(sum of abundances of species 2)). If the abundance matrix is a 0-1-matrix, this gives the standard Kulczynski distance.

Value

A symmetrical matrix of quantitative Kulczynski distances.

Author(s)

Christian Hennig chrish@stats.ucl.ac.uk http://www.homepages.ucl.ac.uk/~ucakche

References

D. P. Faith, P. R. Minchin and L. Belbin (1987) Compositional dissimilarity as a robust measure of ecological distance. Vegetation 69, 57-68.

See Also

kulczynski

Examples

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