| mollusk {PLNmodels} | R Documentation |
Mollusk data set
Description
This data set gives the abundance of 32 mollusk species in 163 samples. For each sample, 4 additional covariates are known.
Usage
mollusk
Format
A list with 2 two data frames:
- Abundance
a 163 x 32 data frame of abundancies/counts (163 samples and 32 mollusk species)
- Covariate
a 163 x 4 data frame of covariates:
- site
a factor with 8 levels indicating the sampling site
- season
a factor with 4 levels indicating the season
- method
a factor with 2 levels for the method of sampling - wood or string
- duration
a numeric with 3 levels for the time of exposure in week
In order to prepare the data for using formula in multivariate analysis (multiple outputs and inputs), use prepare_data().
Original data set has been extracted from ade4.
Source
Data from Richardot-Coulet, Chessel and Bournaud.
References
Richardot-Coulet, M., Chessel D. and Bournaud M. (1986) Typological value of the benthos of old beds of a large river. Methodological approach. Archiv fùr Hydrobiologie, 107, 363–383.
See Also
Examples
data(mollusk)
mollusc <- prepare_data(mollusk$Abundance, mollusk$Covariate)