Rao's Diversity Coefficient
Calculates Rao's diversity coefficient (also known as "Quadratic Entropy") within samples.
DivCoef(df, dis, scale)
df |
a data frame with elements as rows, samples as columns, and abundance, presence-absence or frequencies as entries |
dis |
an object of class |
scale |
a logical value indicating whether or not the diversity coefficient should be scaled by its maximal value over all frequency distributions. |
Returns a data frame with samples as rows and the diversity coefficient within samples as columns
This function was previously published as divc() in the ade4 package and has been integrated here without logical changes.
Sandrine Pavoine pavoine@biomserv.univ-lyon1.fr
Rao, C.R. (1982) Diversity and dissimilarity coefficients: a unified approach. Theoretical Population Biology, 21, 24–43.
Gini, C. (1912) Variabilita e mutabilita. Universite di Cagliari III, Parte II.
Simpson, E.H. (1949) Measurement of diversity. Nature, 163, 688.
Champely, S. and Chessel, D. (2002) Measuring biological diversity using Euclidean metrics. Environmental and Ecological Statistics, 9, 167–177.
# data(ecomor) # dtaxo <- dist.taxo(ecomor$taxo) # DivCoef(ecomor$habitat, dtaxo) # data(humDNAm) # DivCoef(humDNAm$samples, sqrt(humDNAm$distances))
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