ardeche {ade4} | R Documentation

## Fauna Table with double (row and column) partitioning

### Description

This data set gives information about species of benthic macroinvertebrates in different sites and dates.

### Usage

    data(ardeche)

### Format

`ardeche` is a list with 6 components.

tab

  is a data frame containing fauna table with 43 species (rows) and 35 samples (columns).

col.blocks

  is a vector containing the repartition of samples for the 6 dates : july 1982, august 1982, november 1982, february 1983, april 1983 and july 1983.

row.blocks

  is a vector containing the repartition of species in the 4 groups defining the species order.

dat.fac

  is a date factor for samples (6 dates).

sta.fac

  is a site factor for samples (6 sites).

esp.fac

  is a species order factor (Ephemeroptera, Plecoptera, Coleoptera, Trichoptera).

### Details

The columns of the data frame `ardeche$tab` define the samples by a number between 1 and 6 (the date) and a letter between A and F (the site).

### Source

Cazes, P., Chessel, D., and Dolédec, S. (1988) L'analyse des correspondances internes d'un tableau partitionné : son usage en hydrobiologie. Revue de Statistique Appliquée, 36, 39–54.

### Examples

    data(ardeche)
    dudi1 <- dudi.coa(ardeche$tab, scan = FALSE)
    s.class(dudi1$co, ardeche$dat.fac)
    if(adegraphicsLoaded()) {
      s.label(dudi1$co, plab.cex = 0.5, add = TRUE)
    } else {
      s.label(dudi1$co, clab = 0.5, add.p = TRUE)
    }

[Package ade4 version 1.7-13 Index]