ade4 (version 1.01)

mafragh: Phyto-Ecological Survey

Description

This data set gives environmental and spatial informations about species and sites.

Usage

data(mafragh)

format

mafragh is a list of 6 components.

1. xy

{are the coordinates of 97 sites.} flo{is a data frame with 97 sites and 56 species.} espnames{is a vector of the names of species.} neig{is the neighbourhood graph of the 97 sites (an object of class 'neig').} mil{is a data frame with 97 sites and 11 environmental variables.} partition{is a factor classifying the 97 sites in 5 classes.}

source

Belair, G.d. and Bencheikh-Lehocine, M. (1987) Composition et d�terminisme de la v�g�tation d'une plaine c�ti"re mar�cageuse : La Mafragh (Annaba, Alg�rie). Bulletin d'Ecologie, 18, 393--407.

Examples

data(mafragh)
par(mfrow = c(3,2))
s.label(mafragh$xy, inc = FALSE, neig = mafragh$neig, 
    sub = "Samples & Neighbourhood graph")
coa1 <- dudi.coa(mafragh$flo, scan = FALSE)
s.value(mafragh$xy, coa1$li[,1], sub = "Axis 1 - COA")
pca1 <- dudi.pca(mafragh$xy, scan = FALSE)
s.value(mafragh$xy, pca1$li[,1], sub = "Axis 1 - PCA")
s.class(pca1$li, mafragh$partition, sub = "Plane 1-2 - PCA")
s.class(coa1$li, mafragh$partition, sub = "Plane 1-2 - COA")
s.chull(mafragh$xy, mafragh$partition, optchull = 1)
par(mfrow = c(1,1))