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]