mammal_data: Mammal sleep data

In miceExt: Extension Package to 'mice'

Description

Modified version of the mammal sleep data set that is included in mice.

Format

A dataset with 62 observations of the following 11 variables:

species

Species of animal

bw

Body weight (kg)

brw

Brain weight (g)

sws

Slow wave ("nondreaming") sleep (hrs/day)

ps

Paradoxical ("dreaming") sleep (hrs/day)

ts

Total sleep (hrs/day) (sum of slow wave and paradoxical sleep)

mls

Maximum life span (years)

gt

Gestation time (days)

pi

Predation index (1-5), 1 = least likely to be preyed upon

sei

Sleep exposure index (1-5), 1 = least exposed (e.g. animal sleeps in a well-protected den), 5 = most exposed

odi

Overall danger index (1-5) based on the above two indices and other information, 1 = least danger (from other animals), 5 = most danger (from other animals)

Details

The original dataset was from a study by Allison and Cicchetti (1976) of 62 mammal species on the interrelationship between sleep, ecological, and constitutional variables, and was adapted in the mice-package. It contains missing values on five variables and has been modified such that for each row, the entries in the column tuples (sws,ps) and (mls,gt) are either pairwiseNA or pairwise non-NA.

Source

Allison, T., Cicchetti, D.V. (1976). Sleep in Mammals: Ecological and Constitutional Correlates. Science, 194(4266), 732-734.

See Also

mammalsleep

miceExt documentation built on March 18, 2018, 1:18 p.m.