rankDC {analogue} R Documentation

## Rank correlation between environmental and species dissimilarities.

### Description

Computes the rank correlation between distances between sites in terms of gradient variables, such as environmental ones, and species composition.

### Usage

rankDC(g, y, dc = c("chord", "bray", "euclidean", "chi.square", "gower"),
method = "spearman")

## S3 method for class 'rankDC'
plot(x, sort = TRUE, decreasing = FALSE,
xlab = "Rank correlation", color = "blue",
pch = 21, bg = "blue", lcolor = "grey",
lty = "solid", ...)

## S3 method for class 'rankDC'
dotplot(x, data = NULL, sort = TRUE, decreasing = FALSE,
xlab = "Rank correlation", ...)


### Arguments

 g the gradient values; usually a data frame of environmental data. y the species data; usually a data frame. dc character; the set of dissimilarity coefficients for which rank correlations with gradient distance are to be computed. method character; the correlation method to use. See the method argument of cor. x an object of class "rankDC". data NULL; ignored, only present for purposes of conformance to generic definition. sort, decreasing logical; should observations be sorted prior to plotting? If so, should they be sorted in order of decreasing size? xlab The x-axis label for the plot. color, pch, bg, lcolor, lty arguments passed to dotchart. ... arguments passed to other methods, including dotchart and dotplot.

### Value

A named vector of rank correlations is returned.

### Author(s)

Gavin L. Simpson, based on rankindex from the vegan package.

rankindex from package vegan. For the dotplot method, see dotplot.

### Examples

data(swappH)
data(swapdiat)

rc <- rankDC(swappH, swapdiat, dc = c("chord","euclidean","gower"))

## base plot uses dotchart()
plot(rc)

## lattice version of the base plot
dotplot(rc)



[Package analogue version 0.17-6 Index]