entropart (version 1.4-6)

GammaEntropy: Reduced-bias gamma entropy of a metacommunity

Description

Calculates the reduced-bias Tsallis entropy of order $q$ of a metacommunity.

Usage

GammaEntropy(MC, q = 1, Correction = "Best", Tree = NULL, Normalize = TRUE,  Z = NULL, CheckArguments = TRUE)

Arguments

MC

A MetaCommunity object.

q

A number: the order of entropy. Default is 1.

Correction

A string containing one of the possible corrections accepted by the bias-corrected entropy function (see details) or "None" or "Best", the default value.

Tree

An object of class hclust or phylog. The tree must be ultrametric.

Normalize

If TRUE (default), the entropy returned by the function is normalized by the height of the tree (it is the weighted average value of the entropy in each slice). If FALSE, it is the unnormalized weighted sum of the results.

Z

A relatedness matrix, i.e. a square matrix whose terms are all positive, strictly positive on the diagonal. Generally, the matrix is a similarity matrix, i.e. the diagonal terms equal 1 and other terms are between 0 and 1.

CheckArguments

Logical; if TRUE, the function arguments are verified. Should be set to FALSE to save time when the arguments have been checked elsewhere.

Value

A number equal to the calculated entropy.

Details

If Tree is not NULL, then phylogenetic entropy is calculated by bcPhyloEntropy. Else, if Z is not NULL, then similarity-based entropy is calculated by bcHqz. Else, neutral entropy is calculated by bcTsallis.

References

Marcon, E., Scotti, I., Herault, B., Rossi, V. and Lang, G. (2014). Generalization of the partitioning of Shannon diversity. PLOS One 9(3): e90289. Marcon, E., Herault, B. (2015). Decomposing Phylodiversity. Methods in Ecology and Evolution 6(3): 333-339.

Marcon, E., Zhang, Z. and Herault, B. (2014). The decomposition of similarity-based diversity and its bias correction. HAL hal-00989454(version 1).

See Also

bcTsallis, bcPhyloEntropy

Examples

  # Load Paracou data (number of trees per species in two 1-ha plot of a tropical forest)
  data(Paracou618)
  # Calculate Simpson gamma entropy
  GammaEntropy(Paracou618.MC, 2)
  # Compare without correction
  GammaEntropy(Paracou618.MC, 2, Correction = "None")
  # Estimate phylogenetic Simpson gamma entropy
  GammaEntropy(Paracou618.MC, 2, Tree = Paracou618.Taxonomy)