vegtf {ade4}R Documentation

Vegetation in Trois-Fontaines

Description

This data set contains abundance values (Braun-Blanquet scale) of 80 plant species for 337 sites. Data have been collected by Sonia Said and Francois Debias.

Usage

data(vegtf)

Format

vegtf is a list containing the following objects :

veg
is a data.frame with the abundance values of 80 species (columns) in 337 sites (rows).
xy
is a data.frame with the spatial coordinates of the sites.
area
is data.frame (area) which define the boundaries of the study site.
nb
is a neighborhood object (class nb defined in package spdep)

Source

Dray, S., Said, S. and Debias, F. (2008) Spatial ordination of vegetation data using a generalization of Wartenberg's multivariate spatial correlation. Journal of vegetation science, 19, 45–56.

Examples

if (require(spdep, quiet=TRUE)){
data(vegtf)
coa1 <- dudi.coa(vegtf$veg,scannf=FALSE)
ms.coa1 <- multispati(coa1,listw=nb2listw(vegtf$nb),nfposi=2,nfnega=0,scannf=FALSE)
summary(ms.coa1)
plot(ms.coa1)
par(mfrow=c(2,2))
s.value(vegtf$xy,coa1$li[,1],area=vegtf$area,include.origin=FALSE)
s.value(vegtf$xy,ms.coa1$li[,1],area=vegtf$area,include.origin=FALSE)
s.label(coa1$c1)
s.label(ms.coa1$c1)
}

[Package ade4 version 1.4-10 Index]