acsh: Average Cost for Spatial Homogenization

In SyNet: Inference and Analysis of Sympatry Networks

Description

Produces a weighted matrix of spatial association between species from points of occurrence.

Usage

  acsh(dotdata)

Arguments

dotdata

Object of class 'dotdata'

Details

This function performs pairwise comparisons between species point sets. It calculates the average displacement required to achieve homopatry between species. If two species share all their records they are said to be homopatric (etymologically, with the same territory).

Given two sets of points A and B, the measure ACSH as described in Dos Santos et al. (2011) corresponds to the weighted average across the nearest interspecific distances between the elements of A and B. The weight assigned to each element is proportional to the mean length of MST arcs incident to it. Close affinity between distributions is suggested when they deliver an ACSH score near to zero.

Value

Returns a matrix that expresses the dissimilarity between species point sets via non-negative real values.

Author(s)

Daniel A. Dos Santos <[e-mail]>

References

Dos Santos D.A., Cuezzo M.G., Reynaga M.C., Dominguez E. 2011. Towards a Dynamic Analysis of Weighted Networks in Biogeography. Systematic Biology (in press).

See Also

Objects of class 'dotdata' are created via procdnpoint.

Examples

  data(mayflynz)
  aux <- procdnpoint(mayflynz) #Pre-processing
  head(acsh(aux)) #Generates the dissimilarity matrix and displays some of its values

SyNet documentation built on May 2, 2019, 1:10 p.m.