meaudret {ade4}R Documentation

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

Description

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

Usage

data(meaudret)

Format

meaudret is a list of 3 components.

mil
is a data frame with 20 sites and 9 variables.
fau
is a data frame with 20 sites and 13 species (Trichopters).
plan
is a data frame with 20 sites and 2 factors.
    dat
    is a factor with 4 levels.
    sta
    is a factor with 5 levels.

Source

Pegaz-Maucet, D. (1980) Impact d'une perturbation d'origine organique sur la dérive des macro-invertébérés benthiques d'un cours d'eau. Comparaison avec le benthos. Thèse de troisième cycle, Université 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)

[Package ade4 version 1.4-0 Index]