qkulczynski {prabclus} | R Documentation |
Computes quantitative Kulczynski distances between the columns of an abundance matrix.
qkulczynski(regmat, log.distance=FALSE)
regmat |
(non-negative) abundance matrix. Columns are species, rows are regions. |
log.distance |
logical. If |
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.
A symmetrical matrix of quantitative Kulczynski distances.
Christian Hennig chrish@stats.ucl.ac.uk http://www.homepages.ucl.ac.uk/~ucakche
D. P. Faith, P. R. Minchin and L. Belbin (1987) Compositional dissimilarity as a robust measure of ecological distance. Vegetation 69, 57-68.
data(kykladspecreg) qkulczynski(t(kykladspecreg))