divc {ade4}R Documentation

Rao's diversity coefficient also called quadratic entropy

Description

Calculates Rao's diversity coefficient within samples.

Usage

divc(df, dis)

Arguments

df a data frame with elements as rows, samples as columns, and abundance, presence-absence or frequencies as entries
dis an object of class dist containing distances or dissimilarities among elements. If dis is NULL, Gini-Simpson index is performed.

Value

Returns a data frame with samples as rows and the diversity coefficient within samples as column

Author(s)

Sandrine Pavoine pavoine@biomserv.univ-lyon1.fr

References

Rao, C.R. (1982) Diversity and dissimilarity coefficients: a unified approach. Theoretical Population Biology, 21, 24–43.

Gini, C. (1912) Variabilitá e mutabilitá. Universite di Cagliari III, Parte II.

Simpson, E.H. (1949) Measurement of diversity. Nature, 163, 688.

Examples

data(humDNAm)
divc(humDNAm$samples, sqrt(humDNAm$distances))
## Not run: 
data(ecomor)
ecomor.phylog <- taxo2phylog(ecomor$taxo)
divc(ecomor$habitat, ecomor.phylog$Wdist)
## End(Not run)

[Package Contents]