pub fn crabs() -> Result<DataFrame, PolarsError>Expand description
§Morphological Measurements on Leptograpsus Crabs
§Description:
The ‘crabs’ data frame has 200 rows and 8 columns, describing 5 morphological measurements on 50 crabs each of two colour forms and both sexes, of the species Leptograpsus variegatus collected at Fremantle, W. Australia.
§Usage:
crabs
§Format:
This data frame contains the following columns:
- ‘sp’ ‘species’ - ‘“B”’ or ‘“O”’ for blue or orange.
- ‘sex’ as it says.
- ‘index’ index ‘1:50’ within each of the four groups.
- ‘FL’ frontal lobe size (mm).
- ‘RW’ rear width (mm).
- ‘CL’ carapace length (mm).
- ‘CW’ carapace width (mm).
- ‘BD’ body depth (mm).
§Source:
Campbell, N.A. and Mahon, R.J. (1974) A multivariate study of variation in two species of rock crab of genus Leptograpsus. Australian Journal of Zoology 22, 417-425.
§References:
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.