skbio.diversity.alpha.
pielou_e
(counts)[source]¶Calculate Pielou’s Evenness index J’.
State: Experimental as of 0.4.1.
Pielou’s Evenness is defined as:
where \(H\) is the Shannon-Wiener entropy of counts and \(S\) is the number of OTUs in the sample.
Parameters: | counts : 1-D array_like, int
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Returns: | double
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Notes
The implementation here is based on the description in Wikipedia [R42]. It was first proposed by E. C. Pielou [R43] and is similar to Heip’s evenness [R44].
References
[R42] | (1, 2) https://en.wikipedia.org/wiki/Species_evenness |
[R43] | (1, 2) Pielou, E. C., 1966. The measurement of diversity in different types of biological collections. Journal of Theoretical Biology, 13, 131-44. |
[R44] | (1, 2) Heip, C. 1974. A new index measuring evenness. J. Mar. Biol. Ass. UK., 54, 555-557. |