crabs {MASS} | R Documentation

## 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

    data(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.

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