NShannon: A function to compute Shannon-Wiener diversity normalized index
Description
The Shannon-Wiener diversity index is based on
the notion of entropy and measures population heterogeneity.
Usage
NShannon(x)
Value
Shannon-Wiener normalized diversity index
Arguments
x
- an object of class matrix (or which can be coerced to that class),
where each column represents the distribution of a group within
spatial units. The number of columns should be greater than 1 (at least 2
groups are required). You should not include a column with total
population, because this will be interpreted as a group.
References
Shannon C. E. (1948) A mathematical theory
of communication. Bell System Technical Journal (27)
See Also
Other multi-group eveness indices:
HShannon, ISimpson,
GiniMulti, DMulti, HMulti,
CMulti