corvus {ade4} | R Documentation

## Corvus morphology

### Description

This data set gives a morphological description of 28 species of the genus Corvus split in two habitat types and phylogeographic stocks.

### Usage

    data(corvus)

### Format

`corvus` is data frame with 28 observations (the species) and 4 variables :

wing

  : wing length (mm)

bill

  : bill length (mm)

habitat

  : habitat with two levels `clos` and `open`

phylog

  : phylogeographic stock with three levels `amer`(America), `orien`(Oriental-Australian), `pale`(Paleoarctic-African)

### References

Laiolo, P. and Rolando, A. (2003) The evolution of vocalisations in the genus Corvus: effects of phylogeny, morphology and habitat. Evolutionary Ecology, 17, 111–123.

### Examples

    data(corvus)

    if(adegraphicsLoaded()) {
      g1 <- s.label(corvus[, 1:2], plab.cex = 0, porigin.include = FALSE, pgrid.draw = FALSE,
        paxes.draw = TRUE, paxes.asp = "full", xlab = names(corvus)[2],
        ylab = names(corvus)[2], plot = FALSE)
      g2 <- s.class(corvus[, 1:2], corvus[, 4]:corvus[, 3], plot = FALSE)
      G <- superpose(g1, g2, plot = TRUE)

    } else {
      plot(corvus[, 1:2])
      s.class(corvus[, 1:2], corvus[, 4]:corvus[, 3], add.p = TRUE)
    }

[Package ade4 version 1.7-13 Index]