R: Mollusk data set

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

`prepare_data()`

### Examples

    data(mollusk)
    mollusc <- prepare_data(mollusk$Abundance, mollusk$Covariate)

[Package PLNmodels version 0.11.6 Index]