Entropy.sd {EntropyEstimation}

Entropy.sd

Description

Returns the estimated asymptotic standard deviation for the Z estimator of Shannon's Entropy. Note that this is also the asymptotic standard deviation of the plug-in estimator. See Zhang and Grabchak (2014a) for details.

Usage

Entropy.sd(x)

Arguments

x

Vector of counts. Must be integer valued. Each entry represents the number of observations of a distinct letter.

Author(s)

Lijuan Cao and Michael Grabchak

References

Z. Zhang and M. Grabchak (2014a). Entropic representation and estimation of diversity indices. http://arxiv.org/abs/1403.3031.

Examples

 x = c(1,3,7,4,8) # vector of counts
 Entropy.sd(x)  # Estimated standard deviation
 
 data = rbinom(10,20,.5)
 counts = tabulate(as.factor(data))
 Entropy.sd(counts)