skbio.diversity.alpha.dominance

skbio.diversity.alpha.dominance(counts)[source]

Calculate dominance.

State: Experimental as of 0.4.0.

Dominance is defined as

\[\sum{p_i^2}\]

where \(p_i\) is the proportion of the entire community that OTU \(i\) represents.

Dominance can also be defined as 1 - Simpson’s index. It ranges between 0 and 1.

Parameters

counts (1-D array_like, int) – Vector of counts.

Returns

Dominance.

Return type

double

See also

simpson()

Notes

The implementation here is based on the description given in 1.

References

1

http://folk.uio.no/ohammer/past/diversity.html