Calculates the reduced-bias Tsallis entropy of order \(q\) of a metacommunity.
GammaEntropy(MC, q = 1, Correction = "Best", Tree = NULL, Normalize = TRUE, Z = NULL, PhyloDetails = FALSE, CheckArguments = TRUE)
A number: the order of entropy. Default is 1.
A string containing one of the possible corrections accepted by the bias-corrected entropy function (see details) or
"Best", the default value.
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).
FALSE, it is the unnormalized weighted sum of the results.
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.
FALSE (default), the function always returns a number. If
Tree is not Tree is not
NULL then a
PhyloValue object is returned with all details. That is used internally by
DivPart to obtain the corrections used to estimate gamma entropy along the tree and apply them to the estimation of alpha diversity.
TRUE, the function arguments are verified. Should be set to
FALSE to save time when the arguments have been checked elsewhere.
Tree is not
NULL, then phylogenetic entropy is calculated by
Z is not
NULL, then similarity-based entropy is calculated by
Else, neutral entropy is calculated by
A number equal to the calculated entropy.
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 3).
# 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) #> UnveilJ #> 0.9863189 # Compare without correction GammaEntropy(Paracou618.MC, 2, Correction = "None") #> None #> 0.9854485 # Estimate phylogenetic Simpson gamma entropy GammaEntropy(Paracou618.MC, 2, Tree = Paracou618.Taxonomy) #>  0.9601824