The beaver data frame has 100 rows and 4 columns. It is a multivariate
time series of class "ts" and also inherits from class "data.frame".
This data set is part of a long study into body temperature regulation in
beavers. Four adult female beavers were live-trapped and had a
temperature-sensitive radio transmitter surgically implanted. Readings were
taken every 10 minutes. The location of the beaver was also recorded and
her activity level was dichotomized by whether she was in the retreat or
outside of it since high-intensity activities only occur outside of the
retreat.
The data in this data frame are those readings for one of the beavers on a day
in autumn.
Usage
beaver
Format
This data frame contains the following columns:
day
The day number. The data includes only data from day 307 and early 308.
time
The time of day formatted as hour-minute.
temp
The body temperature in degrees Celsius.
activ
The dichotomized activity indicator. 1 indicates that the beaver is outside
of the retreat and therefore engaged in high-intensity activity.
Source
The data were obtained from
Reynolds, P.S. (1994) Time-series analyses of beaver body temperatures.
In Case Studies in Biometry. N. Lange, L. Ryan, L. Billard,
D. Brillinger, L. Conquest and J. Greenhouse (editors), 211–228. John Wiley.
References
Davison, A.C. and Hinkley, D.V. (1997)
Bootstrap Methods and Their Application. Cambridge University Press.