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Hurlbert's unbiased estimate of Sander's rarefaction.

Usage

index_hurlbert(x, ...)

# S4 method for numeric
index_hurlbert(x, sample, ...)

Arguments

x

A numeric vector of count data (absolute frequencies).

...

Currently not used.

sample

A length-one numeric vector giving the sub-sample size. The size of sample should be smaller than total community size.

Value

A numeric vector.

References

Hurlbert, S. H. (1971). The Nonconcept of Species Diversity: A Critique and Alternative Parameters. Ecology, 52(4), 577-586. doi:10.2307/1934145 .

Sander, H. L. (1968). Marine Benthic Diversity: A Comparative Study. The American Naturalist, 102(925), 243-282.

Author

N. Frerebeau