ade4 (version 1.5-2)

meau: Ecological Data : sites-variables, sites-species, where and when

Description

This data set contains information about sites, environmental variables and Ephemeroptera Species.

Usage

data(meau)

encoding

latin1

source

Pegaz-Maucet, D. (1980) Impact d'une perturbation d'origine organique sur la d�rive des macro-invert�br�s benthiques d'un cours d'eau. Comparaison avec le benthos. Th�se de troisi�me cycle, Universit� Lyon 1, 130 p.

Thioulouse, J., Simier, M. and Chessel, D. (2004) Simultaneous analysis of a sequence of paired ecological tables. Ecology, 85, 1, 272--283.

Details

Data set equivalents to meaudret, except that one site (6) along the Bourne (a Meaudret affluent) and one physico chemical variable - the oxygen concentration were added.

Examples

data(meau)
par(mfrow = c(2,2))
pca1 <- dudi.pca(meau$env, scan = FALSE, nf = 4)
s.class(pca1$li, meau$design$season, 
    sub = "Principal Component Analysis")
pca2 <- between(pca1, meau$design$season, scan = FALSE, nf = 2)
s.class(pca2$ls, meau$design$season, sub = "Between seasons Principal Component Analysis")
s.corcircle(pca1$co)
s.corcircle(pca2$as)