salamander {mdhglm}

Salamander Data

Description

McCullagh and Nelder (1989) presented a data set on salamander mating. Three experiments were conducted: two were done with the same salamanders in the summer and autumn and another one in the autumn of the same year using different salamanders. The response variable is binary, indicating success of mating. In each experiment, 20 females and 20 males from two populations called whiteside, denoted by W, and rough butt, denoted by R, were paired six times for mating with individuals from their own and the other population, resulting in 120 observations in each experiment.

Usage

data("salamander")

Format

A data frame with 360 observations on the following 7 variables.

Season

a factor with levels Fall and Summer

Experiment

experiment number

TypeM

a factor for male with levels R and W

TypeF

a factor for female with levels R and W

Male

males identifier for 20 males

Female

females idenfier for females

Mate

1=success of mating, 0=failness of mating

Source

McCullagh, P. and Nelder, J.A. (1989). Generalized Linear Models. Chapman and Hall, London.