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Berger-Parker Dominance Index

Usage

index_berger(x, ...)

# S4 method for numeric
index_berger(x, na.rm = FALSE, ...)

Arguments

x

A numeric vector of count data (absolute frequencies).

...

Currently not used.

na.rm

A numeric scalar: should missing values (including NaN) be removed?

Value

A numeric vector.

Details

The Berger-Parker index expresses the proportional importance of the most abundant type. This metric is highly biased by sample size and richness, moreover it does not make use of all the information available from sample.

This is a dominance index, so that an increase in the value of the index accompanies a decrease in diversity.

References

Berger, W. H. & Parker, F. L. (1970). Diversity of Planktonic Foraminifera in Deep-Sea Sediments. Science, 168(3937), 1345-1347. doi:10.1126/science.168.3937.1345 .

Author

N. Frerebeau