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Crabs (B vs O) data
The data set (and description) can be downloaded here:
http://stat.ethz.ch/Teaching/Datasets/crabs.dat
Description:
TITLE : crabs
KEYWORDS (statist) : discriminant analysis
APPLICATION AREA : biology, zoology, environment
SHORT DESCRIPTION :
Leptograpsus crabs
Data from Campbell & Mahon (1974) on the morphology of
rock crabs of genus Leptograpsus. There are 50 specimens
of each sex of each of two colour forms.
Variables are:
- colour form (B = blue form, O = orange form);
- sex (M = male, F = female);
- index within each group of 50;
- frontal lip of carapace, in mm;
- rear width of carapace, in mm;
- length along the midline of carapace, in mm;
- maximum width of carapace, in mm;
- body depth, in mm.
DIM.(VAR./OBS.) : 5 / 200
/ LITERATURE : /
Ripley (1996): Pattern Recognition and Neural Networks.
Descriptive statistics:
Dataset= crab_BvsO : n= 200 , d= 5
Class1: n= 100
Covariance matrix:
[,1] [,2] [,3] [,4] [,5]
[1,] 9.1180 6.1795 20.7416 23.6424 9.1584
[2,] 6.1795 5.1952 14.1030 16.2109 6.3228
[3,] 20.7416 14.1030 47.6473 54.2205 21.0049
[4,] 23.6424 16.2109 54.2205 61.8746 23.9526
[5,] 9.1584 6.3228 21.0049 23.9526 9.4119
Correlation matrix:
[,1] [,2] [,3] [,4] [,5]
[1,] 1.0000 0.8979 0.9951 0.9954 0.9886
[2,] 0.8979 1.0000 0.8964 0.9042 0.9042
[3,] 0.9951 0.8964 1.0000 0.9986 0.9919
[4,] 0.9954 0.9042 0.9986 1.0000 0.9926
[5,] 0.9886 0.9042 0.9919 0.9926 1.0000
Median: 14.2256 12.1822 30.2594 34.9459 12.6491
Mean: 14.056 11.928 30.058 34.717 12.583
MCD-estimated:
MDC-0.975-Mean: 13.4902 11.4549 28.7098 33.161 11.989
MDC-0.750-Mean: 13.32 11.3813 28.2938 32.6938 11.8025
MDC-0.500-Mean: 13.3687 11.394 28.4434 32.853 11.8506
Class2: n= 100
Covariance matrix:
[,1] [,2] [,3] [,4] [,5]
[1,] 10.7294 7.7187 21.9016 24.4909 10.1408
[2,] 7.7187 6.7888 15.4190 17.6731 7.0596
[3,] 21.9016 15.4190 45.7552 50.8440 21.1926
[4,] 24.4909 17.6731 50.8440 56.8655 23.5308
[5,] 10.1408 7.0596 21.1926 23.5308 9.9318
Correlation matrix:
[,1] [,2] [,3] [,4] [,5]
[1,] 1.0000 0.9044 0.9885 0.9915 0.9824
[2,] 0.9044 1.0000 0.8749 0.8995 0.8597
[3,] 0.9885 0.8749 1.0000 0.9968 0.9941
[4,] 0.9915 0.8995 0.9968 1.0000 0.9901
[5,] 0.9824 0.8597 0.9941 0.9901 1.0000
Median: 17.4353 13.8267 34.5164 38.6957 15.631
Mean: 17.11 13.549 34.153 38.112 15.478
MCD-estimated:
MDC-0.975-Mean: 16.5826 13.014 33.2174 37.0488 15.0407
MDC-0.750-Mean: 16.5718 13.0259 33.2035 37.0459 15.0376
MDC-0.500-Mean: 16.5826 13.014 33.2174 37.0488 15.0407
Measures:
Mah.Dist: 5.2224
Mah.Dist-MCD-0.975: 5.026
Mah.Dist-MCD-0.750: 5.0147
Mah.Dist-MCD-0.500: 5.0349
Zuletzt geändert am 17.02.2013
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