ade4 (version 1.2-2)

divc: 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

References

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

Gini, C. (1912) Variabilit� e mutabilit�. 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))
data(ecomor)
ecomor.phylog <- taxo2phylog(ecomor$taxo)
divc(ecomor$habitat, ecomor.phylog$Wdist)