ade4 (version 1.01)

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

Description

This data set contains informations about sites, environmental variables and species (Trichopters).

Usage

data(meaudret)

format

meaudret is a list of 4 components.

1. mil

{is a data frame with 24 sites and 9 variables.} fau{is a data frame with 24 sites and 10 species (Trichopters).} date{is a factor with 4 levels.} site{is a factor with 6 levels.}

source

Pegaz-Maucet, D. (1980) Impact d'une perturbation d'origine organique sur la d�rive des macro-invert�b�r�s benthiques d'un cours d'eau. Comparaison avec le benthos. Th"se de 3� cycle, Universit� Lyon 1, 130 p.

Examples

data(meaudret)
par(mfrow = c(2,2))
pca1 <- dudi.pca(meaudret$mil, scan = FALSE, nf = 4)
s.class(pca1$li, meaudret$plan$dat, 
    sub = "Principal Component Analysis")
pca2 <- between(pca1, meaudret$plan$dat, scan = FALSE, nf = 2)
s.class(pca2$ls, meaudret$plan$dat, sub = "Between dates Principal Component Analysis")
s.corcircle(pca1$co)
s.corcircle(pca2$as)
par(mfrow = c(1,1))