| sleep {psy} | R Documentation |
Ecological and Constitutional Data in Mammals
Description
Data from which conclusions were drawn in the article Mammals: Ecological and Constitutional Correlates, by Allison, T. and Cicchetti, D. (1976) Science, November 12, vol. 194, pp.732-734
Usage
data(sleep)Format
This data frame contains the following columns:
- Species
a factor with levels
- Body.weight
a numeric vector, body weight in kg
- Brain.weight
a numeric vector, Brain weight in g
- Slow.wave.sleep
a numeric vector, nondreaming sleep (hrs/day)
- Paradoxical.sleep
a numeric vector, dreaming sleep (hrs/day)
- Total.sleep
a numeric vector, nondreaming + "dreaming" (hrs/day)
- Maximum.life.span
a numeric vector (in years)
- Gestation.time
a numeric vector (in days)
- Predation
a numeric vector, Predation index (1 min - 5 max)
- Sleep.exposure
a numeric vector, Sleep exposure index (1 min - 5 max)
- Danger
a numeric vector, Overall danger index (1 min - 5 max)
Source
http://lib.stat.cmu.edu/datasets/sleep
References
Mammals: Ecological and Constitutional Correlates, by Allison, T. and Cicchetti, D. (1976) Science, November 12, vol. 194, pp.732-734
Examples
data(sleep)
str(sleep)