crabs {asbio}R Documentation

Agresti crabs dataset

Description

Horseshoe crab satellite counts as a function of crab phenotype.

Usage

data(crabs)

Format

A data frame with 173 observations on the following 5 variables.

color

A factor with levels 1 = light medium, 2 = medium, 3 = dark medium, 4 = dark.

spine

A factor with levels 1 = both good, 2 = one worn or broken, 3 = both worn or broken.

width

Crab carapace width in cm.

satell

Number of satellites.

weight

Crab weight in in kg.

Source

Agresti, A. (2012) An Introduction to Categorical Data Analysis, 3rd edition. Wiley, New Jersey.

References

Brockman, H. J. (1996) Satellite male groups in horseshoe crabs, Limulus polyphemus. Ethology 102(1) 1-21.


[Package asbio version 1.7 Index]