NShannon {OasisR} | R Documentation |
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)
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. |
Value
The Shannon-Wiener normalized diversity index value (numeric)
References
Shannon C. E. (1948) A mathematical theory of communication. Bell System Technical Journal (27)
See Also
Other multigroup eveness indices:
HShannon
, ISimpson
,
GiniMulti
, DMulti
, HMulti
,
CMulti
Other multigroup indices: PMulti
,
RelDivers
Examples
x <- segdata@data[ ,1:2]
NShannon(x)
[Package OasisR version 3.1.1 Index]