coalminer {orth}R Documentation

Coal Miner Data

Description

This data is from chapter 6 (Table 6.6) of McCullagh and Nelder (1989).

Usage

data(coalminer)

Format

A dataframe with 72 observations on the following 6 columns.

id
Cluster id: This identifies the age group
y
Binary variate indicating whether the subject has the event in question or not. Since each subject is measured on two-variates, breathlessness (B) and wheezing (W), it means that Y_i for a subject in the i-th age group can be thought of as a 2 by 1 vector of the form Y_i = (Y_B, Y_W) where Y_B, Y_W = 0,1. For example, Y_B=0 and Y_W=0 means no breathlessness and no wheezing.
age
age group
ageCntrd
age centered at 5
wheeze
indicator for whether the response refers to wheezing or breathlessness. 1 if wheezing and 0 if breathlessness.
count
Cluster weights: these number refer to how many subjects in a particular age group who has the event (y_B, y_W)

References

P. McCullagh and J. A. Nelder. Generalized Linear Models (2nd ed.).
London: Chapman and Hall, 1989.


[Package orth version 1.5 Index]