| 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 christian.hennig@unibo.it https://www.unibo.it/sitoweb/christian.hennig/en
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))