R: Kulczynski distance matrix

kulczynski {prabclus} | R Documentation

## Kulczynski distance matrix

### Description

Computes Kulczynski distances between the columns of a 0-1-matrix.

### Usage

    kulczynski(regmat)

### Arguments

`regmat` | 0-1-matrix. Columns are species, rows are regions.

### Details

The Kulczynski distance between two species is 1-(mean of (number of regions where both species are present)/(number of regions where species 1 is present) and (number of regions where both species are present)/(number of regions where species 2 is present)). The similarity version of this is S28 in Shi (1993).

### Value

A symmetrical matrix of Kulczynski distances.

### Author(s)

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

### References

Shi, G. R. (1993) Multivariate data analysis in palaeoecology and palaeobiogeography - a review. Palaeogeography, Palaeoclimatology, Palaeoecology 105, 199-234.

### See Also

`jaccard`, `geco`,`qkulczynski` , `dicedist`

### Examples

    options(digits=4)
    data(kykladspecreg)
    kulczynski(t(kykladspecreg))

[Package prabclus version 2.2-6 Index]