labdsv (version 2.1-0)

stepdist: Step-Across Distance

Description

Solves for the shortest-path step-across distance for a given distance matrix

Usage

stepdist(dis,alpha)

Value

an object of class ‘dist’

Arguments

dis

a distance or dissimilarity object of class ‘dist’

alpha

a threshold distance to establish the step-across

Author

David W. Roberts

Details

The function takes the dist object and converts all values >= alpha to 9999.9 and then solves for new distances by calculating the transitive closure of the triangle inequality.

Examples

data(bryceveg)
dis.bc <- dsvdis(bryceveg,'bray')
dis.bcx <- stepdist(dis.bc,1.00)
disana(dis.bcx)