meaudret {ade4} | R Documentation

## 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 3 components.

mil
  is a data frame with 24 sites and 9 variables.
fau
  is a data frame with 24 sites and 13 species (Trichopters).
plan
  is a data frame with 24 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)

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