labdsv (version 1.2-1)

ordcomp: Ordination to Dissimilarity Comparison

Description

Plots the distribution of pair-wise distances of all points in an ordination to the distances in the dissimilarity or distance matrix the ordination was calculated from. Prints the correlation between the two on the graph.

Usage

ordcomp(x,y,dim=2,xlab="Computed Distance",ylab="Ordination Distance",
            title="",pch=1)

Arguments

x

an object of class dist

y

an ordination object from pca, pco, nmds, fso

dim

the number of dimensions in the ordination to use (default=2)

xlab

the X axis label for the graph

ylab

the Y axis label for the graph

title

a title for the plot

pch

the symbol to plot

Value

• a plot is created on the current graphics device

References

http://ecology.msu.montana.edu/labdsv/R

Examples

data(bryceveg) # produces a vegetation dataframe
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
ordcomp(pco.bc,dis.bc)