index_cody {tabula}

Cody Measure

Description

Cody Measure

Usage

index_cody(x, ...)

## S4 method for signature 'matrix'
index_cody(x)

Arguments

x

A m \times p numeric matrix of count data (absolute frequencies, i.e. a contingency table).

...

Currently not used.

Details

This assumes that the order of the matrix rows (from 1 to n) follows the progression along the gradient/transect.

Value

A numeric vector.

Author(s)

N. Frerebeau

References

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.

See Also

Other beta diversity measures: index_binomial(), index_brainerd(), index_bray(), index_jaccard(), index_morisita(), index_routledge, index_sorenson(), index_whittaker(), index_wilson()