R: Morphological Study of the Painted Turtle

tortues {ade4} | R Documentation

## Morphological Study of the Painted Turtle

### Description

This data set gives a morphological description (4 characters) of 48 turtles.

### Usage

    data(tortues)

### Format

a data frame with 48 rows and 4 columns (length (mm), maximum width(mm), height (mm), gender).

### Source

Jolicoeur, P. and Mosimann, J. E. (1960) Size and shape variation in the painted turtle. A principal component analysis. Growth, 24, 339–354.

### Examples

    data(tortues)
    xyz <- as.matrix(tortues[, 1:3])
    ref <- -svd(xyz)$u[, 1]
    pch0 <- c(1, 20)[as.numeric(tortues$sexe)]
    plot(ref, xyz[, 1], ylim = c(40, 180), pch = pch0)
    abline(lm(xyz[, 1] ~ -1 + ref))
    points(ref,xyz[, 2], pch = pch0)
    abline(lm(xyz[, 2] ~ -1 + ref))
    points(ref,xyz[, 3], pch = pch0)
    abline(lm(xyz[, 3] ~ -1 + ref))

[Package ade4 version 1.7-18 Index]