Cody Measure
index_cody(x, ...)# S4 method for matrix
index_cody(x)
A numeric vector.
A \(m \times p\) numeric matrix of count data
(absolute frequencies, i.e. a contingency table).
Currently not used.
N. Frerebeau
This assumes that the order of the matrix rows (from \(1\) to \(n\)) follows the progression along the gradient/transect.
Cody, M. L. (1975). Towards a theory of continental species diversity: Bird distributions over Mediterranean habitat gradients. In M. L. Cody & J. M. Diamond (Eds.), Ecology and Evolution of Communities. Cambridge, MA: Harvard University Press, p. 214-257.
Other beta diversity measures:
index_binomial(),
index_brainerd(),
index_bray(),
index_jaccard(),
index_morisita(),
index_routledge,
index_sorenson(),
index_whittaker(),
index_wilson()