mollusc {ade4} | R Documentation

## Faunistic Communities and Sampling Experiment

### Description

This data set gives the abundance of 32 mollusk species in 163 samples. For each sample, 4 informations are known : the sampling sites, the seasons, the sampler types and the time of exposure.

### Usage

    data(mollusc)

### Format

`mollusc` is a list of 2 objects.

fau
  is a data frame with 163 samples and 32 mollusk species (abundance).
plan
  contains the 163 samples and 4 variables.

### Source

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.

### Examples

    data(mollusc)
    coa1 <- dudi.coa(log(mollusc$fau + 1), scannf = FALSE, nf = 3)
    par(mfrow = c(2,2))
    s.chull(coa1$li, mollusc$plan$site, 2, 3, opt = 1, cpoi = 1)
    s.chull(coa1$li, mollusc$plan$season, 2, 3, opt = 1, cpoi = 1)
    s.chull(coa1$li, mollusc$plan$method, 2, 3, opt = 1, cpoi = 1)
    s.chull(coa1$li, mollusc$plan$duration, 2, 3, opt = 1, cpoi = 1)
    par(mfrow=c(1,1))

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