Description

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

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.