A version of the eruptions data from the ‘Old Faithful’ geyser
in Yellowstone National Park, Wyoming. This version comes from
Azzalini and Bowman (1990) and is of continuous measurement from August
1 to August 15, 1985.
Some nocturnal duration measurements
have originally been described as ‘short’, ‘medium’
or ‘long’ and are given as interval censored observations in this
version of the dataset.
Usage
geyser
Format
A data frame with 299 observations on 2 variables.
duration
Surv
Eruption time in mins
waiting
numeric
Waiting time for this eruption
Note
Variable duration was converted to a Surv object for
representing interval censored nocturnal observations.
References
Azzalini, A. and Bowman, A. W. (1990) A look at some
data on the Old Faithful geyser. Applied Statistics39, 357–365.
Venables, W. N. and Ripley, B. D. (2002)
Modern Applied Statistics with S. Fourth edition. Springer.