kulczynski {prabclus} | R Documentation |
Computes Kulczynski distances between the columns of a 0-1-matrix.
kulczynski(regmat)
regmat |
0-1-matrix. Columns are species, rows are regions. |
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).
A symmetrical matrix of Kulczynski distances.
Christian Hennig chrish@stats.ucl.ac.uk http://www.homepages.ucl.ac.uk/~ucakche
Shi, G. R. (1993) Multivariate data analysis in palaeoecology and palaeobiogeography - a review. Palaeogeography, Palaeoclimatology, Palaeoecology 105, 199-234.
jaccard
, geco
,qkulczynski
,
dicedist
data(kykladspecreg) kulczynski(t(kykladspecreg))