SMPracticals (version 1.4-3.1)

coal: Data on UK coal mining disasters

Description

The 'coal' data frame has 191 rows and 1 column.

This data frame gives the dates of 191 explosions in UK coal mines which resulted in 10 or more fatalities. The time span of the data is from March 15, 1851 until March 22 1962.

Usage

data(coal)

Format

This data frame contains the following column:

date

The date of the disaster. The integer part of 'date' gives the year. The day is represented as the fraction of the year that had elapsed on that day.

References

Jarrett, R.G. (1979) A note on the intervals between coal-mining disasters. Biometrika, 66, 191--193.

Examples

data(coal)
plot(density(coal$date))
rug(coal$date)