Zoo: Zoo Data

In mlbench: Machine Learning Benchmark Problems

Description

A simple dataset containing 17 (mostly logical) variables on 101 animals.

Usage

data(Zoo)

Format

A data frame with 17 columns: hair, feathers, eggs, milk, airborne, aquatic, predator, toothed, backbone, breathes, venomous, fins, legs, tail, domestic, catsize, type.

Most variables are logical and indicate whether the corresponding animal has the corresponsing characteristic or not. The only 2 exceptions are: legs takes values 0, 2, 4, 5, 6, and 8. type is a grouping of the animals into 7 groups, see the example section for the detailed list.

Details

Ask the original donor of the data why girl is an animal.

Source

The original data have been donated by Richard S. Forsyth to the UCI Repository Of Machine Learning Databases at

• http://www.ics.uci.edu/~mlearn/MLRepository.html.

and were converted to R format by Friedrich Leisch.

References

Newman, D.J. & Hettich, S. & Blake, C.L. & Merz, C.J. (1998). UCI Repository of machine learning databases [http://www.ics.uci.edu/~mlearn/MLRepository.html]. Irvine, CA: University of California, Department of Information and Computer Science.

Examples

data(Zoo)
summary(Zoo)

## see the annimals grouped by type
tapply(rownames(Zoo), Zoo$type, function(x) x)

## which animals have fins?
rownames(Zoo)[Zoo$fins]

Example output

    hair          feathers          eggs            milk        
 Mode :logical   Mode :logical   Mode :logical   Mode :logical  
 FALSE:58        FALSE:81        FALSE:42        FALSE:60       
 TRUE :43        TRUE :20        TRUE :59        TRUE :41       
                                                                
                                                                
                                                                
                                                                
  airborne        aquatic         predator        toothed       
 Mode :logical   Mode :logical   Mode :logical   Mode :logical  
 FALSE:77        FALSE:65        FALSE:45        FALSE:40       
 TRUE :24        TRUE :36        TRUE :56        TRUE :61       
                                                                
                                                                
                                                                
                                                                
  backbone        breathes        venomous          fins        
 Mode :logical   Mode :logical   Mode :logical   Mode :logical  
 FALSE:18        FALSE:21        FALSE:93        FALSE:84       
 TRUE :83        TRUE :80        TRUE :8         TRUE :17       
                                                                
                                                                
                                                                
                                                                
      legs          tail          domestic        catsize       
 Min.   :0.000   Mode :logical   Mode :logical   Mode :logical  
 1st Qu.:2.000   FALSE:26        FALSE:88        FALSE:57       
 Median :4.000   TRUE :75        TRUE :13        TRUE :44       
 Mean   :2.842                                                  
 3rd Qu.:4.000                                                  
 Max.   :8.000                                                  
                                                                
            type   
 mammal       :41  
 bird         :20  
 reptile      : 5  
 fish         :13  
 amphibian    : 4  
 insect       : 8  
 mollusc.et.al:10  
$mammal
 [1] "aardvark" "antelope" "bear"     "boar"     "buffalo"  "calf"    
 [7] "cavy"     "cheetah"  "deer"     "dolphin"  "elephant" "fruitbat"
[13] "giraffe"  "girl"     "goat"     "gorilla"  "hamster"  "hare"    
[19] "leopard"  "lion"     "lynx"     "mink"     "mole"     "mongoose"
[25] "opossum"  "oryx"     "platypus" "polecat"  "pony"     "porpoise"
[31] "puma"     "pussycat" "raccoon"  "reindeer" "seal"     "sealion" 
[37] "squirrel" "vampire"  "vole"     "wallaby"  "wolf"    

$bird
 [1] "chicken"  "crow"     "dove"     "duck"     "flamingo" "gull"    
 [7] "hawk"     "kiwi"     "lark"     "ostrich"  "parakeet" "penguin" 
[13] "pheasant" "rhea"     "skimmer"  "skua"     "sparrow"  "swan"    
[19] "vulture"  "wren"    

$reptile
[1] "pitviper" "seasnake" "slowworm" "tortoise" "tuatara" 

$fish
 [1] "bass"     "carp"     "catfish"  "chub"     "dogfish"  "haddock" 
 [7] "herring"  "pike"     "piranha"  "seahorse" "sole"     "stingray"
[13] "tuna"    

$amphibian
[1] "frog.1" "frog.2" "newt"   "toad"  

$insect
[1] "flea"     "gnat"     "honeybee" "housefly" "ladybird" "moth"     "termite" 
[8] "wasp"    

$mollusc.et.al
 [1] "clam"     "crab"     "crayfish" "lobster"  "octopus"  "scorpion"
 [7] "seawasp"  "slug"     "starfish" "worm"    

 [1] "bass"     "carp"     "catfish"  "chub"     "dogfish"  "dolphin" 
 [7] "haddock"  "herring"  "pike"     "piranha"  "porpoise" "seahorse"
[13] "seal"     "sealion"  "sole"     "stingray" "tuna"    

mlbench documentation built on Jan. 29, 2021, 5:05 p.m.