% Data from StatLib (ftp stat.cmu.edu/datasets)
% 
% Data from which conclusions  were  drawn  in  the  article  "Sleep  in 
% Mammals: Ecological and Constitutional Correlates" by Allison, T.  and 
% Cicchetti, D. (1976), _Science_, November 12, vol. 194,  pp.  732-734. 
% Includes brain and body  weight,  life  span,  gestation  time,  time 
% sleeping, and predation and danger indices for 62 mammals.
% 
% 
% 
% Variables below (from left to right) for Mammals Data Set:
% 
% species of animal
% 
% body weight in kg
% 
% brain weight in g
% 
% slow wave ("nondreaming") sleep (hrs/day)
% 
% paradoxical ("dreaming") sleep (hrs/day)
% 
% total sleep (hrs/day)  (sum of slow wave and paradoxical sleep)
% 
% maximum life span (years)
% 
% gestation time (days)
% 
% predation index (1-5)
%                 1 = minimum (least likely to be preyed upon)
%                 5 = maximum (most likely to be preyed upon)
% 
% sleep exposure index (1-5)
%                 1 = least exposed (e.g. animal sleeps in a 
%                     well-protected den)
%                 5 = most exposed
% 
% 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)
% 
% Note: Missing values denoted by -999.0
% 
% 
% For more details, see
% 
% Allison, Truett and Cicchetti, Domenic V. (1976), "Sleep  in  Mammals: 
% Ecological and Constitutional  Correlates",  _Science_,  November  12, 
% vol. 194, pp. 732-734.
% 
% The above data set can be freely used for non-commercial purposes  and 
% can be freely distributed (permission in  writing  obtained  from  Dr. 
% Truett Allison).
% 
% Submitted by Roger Johnson
% rwjohnso@silver.sdsmt.edu
% 
% Total sleep treated as the class attribute. Attributes for slow
% wave and paradoxical sleep have been deleted. (The animal's
% name has also been deleted.)  
@relation sleep
@attribute body_weight numeric
@attribute brain_weight numeric
@attribute max_life_span numeric
@attribute gestation_time numeric
@attribute predation_index numeric
@attribute sleep_exposure_index numeric
@attribute danger_index numeric
@attribute total_sleep numeric

@data
6654.0,5712,38,645,3,5,3,3.3
1.0,6,4,42,3,1,3,8.3
3.385,44,14,60,1,1,1,12.5
0.92,5,-2147483648,25,5,2,3,16.5
2547.0,4603,69,624,3,5,4,3.9
10.55,179,27,180,4,4,4,9.8
0.023,0,19,35,1,1,1,19.7
160.0,169,30,392,4,5,4,6.2
3.3,25,28,63,1,2,1,14.5
52.16,440,50,230,1,1,1,9.7
0.425,6,7,112,5,4,4,12.5
465.0,423,30,281,5,5,5,3.9
0.55,2,-2147483648,-2147483648,2,1,2,10.3
187.1,419,40,365,5,5,5,3.1
0.075,1,3,42,1,1,1,8.4
3.0,25,50,28,2,2,2,8.6
0.785,3,6,42,2,2,2,10.7
0.2,5,10,120,2,2,2,10.7
1.41,17,34,-2147483648,1,2,1,6.1
60.0,81,7,-2147483648,1,1,1,18.1
529.0,680,28,400,5,5,5,nan
27.66,115,20,148,5,5,5,3.8
0.12,1,3,16,3,1,2,14.4
207.0,406,39,252,1,4,1,12.0
85.0,325,41,310,1,3,1,6.2
36.33,119,16,63,1,1,1,13.0
0.101,4,9,28,5,1,3,13.8
1.04,5,7,68,5,3,4,8.2
521.0,655,46,336,5,5,5,2.9
100.0,157,22,100,1,1,1,10.8
35.0,56,16,33,3,5,4,nan
0.005,0,2,21,5,2,4,9.1
0.01,0,24,50,1,1,1,19.9
62.0,1320,100,267,1,1,1,8.0
0.122,3,-2147483648,30,2,1,1,10.6
1.35,8,-2147483648,45,3,1,3,11.2
0.023,0,3,19,4,1,3,13.2
0.048,0,2,30,4,1,3,12.8
1.7,6,5,12,2,1,1,19.4
3.5,10,6,120,2,1,1,17.4
250.0,490,23,440,5,5,5,nan
0.48,15,12,140,2,2,2,17.0
10.0,115,20,170,4,4,4,10.9
1.62,11,13,17,2,1,2,13.7
192.0,180,27,115,4,4,4,8.4
2.5,12,18,31,5,5,5,8.4
4.288,39,13,63,2,2,2,12.5
0.28,1,4,21,3,1,3,13.2
4.235,50,9,52,1,1,1,9.8
6.8,179,29,164,2,3,2,9.6
0.75,12,7,225,2,2,2,6.6
3.6,21,6,225,3,2,3,5.4
14.83,98,17,150,5,5,5,2.6
55.5,175,20,151,5,5,5,3.8
1.4,12,12,90,2,2,2,11.0
0.06,1,3,-2147483648,3,1,2,10.3
0.9,2,4,60,2,1,2,13.3
2.0,12,7,200,3,1,3,5.4
0.104,2,2,46,3,2,2,15.8
4.19,58,24,210,4,3,4,10.3
3.5,3,3,14,2,1,1,19.4
4.05,17,13,38,3,1,1,nan