labdsv (version 2.1-0)

orddist: Ordination Point Pair-Wise Distance Calculation

Description

Calculates the pair-wise distances of all points in an ordination. The function is simply a wrapper for the ‘dist’ function, but simplifies managing ordinations that store their coordinates under different names, as well as managing the desired dimensionality of the calculations.

Usage

orddist(x,dim)

Value

An object of class ‘dist’ is produced

Arguments

x

an ordination object of class ‘dsvord’ from pca, pco, nmds, fso

dim

the desired dimensionality to be included in the calculations (must be <= number of dimensions of the ordinations)

Author

David W. Roberts

Examples

data(bryceveg) # produces a vegetation data.frame
dis.bc <- dsvdis(bryceveg,'bray/curtis') # creates a Bray/Curtis 
                                         #dissimilarity matrix
pco.bc <- pco(dis.bc,2) # produces a two-dimensional Principal 
                        # Coordinates Ordination object
orddist(pco.bc,dim=2)