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)