R: Historical data used for classification examples.

flea {GGally} | R Documentation

## Historical data used for classification examples.

### Description

This data contains physical measurements on three species of flea beetles.

### Usage

    data(flea)

### Format

A data frame with 74 rows and 7 variables

### Details

- species Ch. concinna, Ch. heptapotamica, Ch. heikertingeri

- tars1 width of the first joint of the first tarsus in microns

- tars2 width of the second joint of the first tarsus in microns

- head the maximal width of the head between the external edges of the eyes in 0.01 mm

- aede1 the maximal width of the aedeagus in the fore-part in microns

- aede2 the front angle of the aedeagus (1 unit = 7.5 degrees)

- aede3 the aedeagus width from the side in microns

### References

Lubischew, A. A. (1962), On the Use of Discriminant Functions in Taxonomy, Biometrics 18:455-477.

[Package GGally version 1.3.2 Index]