EcoSimR (version 0.1.0)

czekanowski_skew: CzekanowskiSkew Niche Overlap Metric

Description

Takes a niche utilization matrix returns the skew of the Czekanowski pairwise niche overlap index.

Usage

czekanowski_skew(m = matrix(rpois(80, 1), nrow = 10))

Arguments

m

a matrix of resource utilization values.

Value

Returns the skewness of the average pairwise niche overlap.

Details

A large positive value for skewness implies that there are more species pairs with high than low niche overlap. A large negative value for skewness implies there are more species pairs with low than high niche overlap. The performance of this algorithm has not been thoroughly tested with real data sets.

References

Winemiller, K.O. and E.R. Pianka. 1990. Organization in natural assemblages of desert lizards and tropical fishes. Ecological Monographs 60: 27-55.

See Also

czekanowski niche overlap index.

Examples

obsSkew <- czekanowski_skew(m=matrix(rpois(40,0.5),nrow=8))