ISimpson {OasisR} | R Documentation |
A function to compute Simpson's interaction index
Description
Simpson's interaction index measures the probability that randomly selected individuals are not in the same group.
Usage
ISimpson(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 Simpson's interaction index value (numeric)
References
Simpson E. H. (1949) Measurement of diversity. Nature 163:688
See Also
Social diversity indices:
HShannon
, NShannon
,
multigroup indices:
PMulti
, GiniMulti
, DMulti
,
HMulti
, CMulti
, RelDivers
Examples
x <- segdata@data[ ,1:2]
ISimpson(x)
[Package OasisR version 3.1.1 Index]