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) – Vector of counts. |
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Returns: | Pielou’s Evenness. |
Return type: | double |
Notes
The implementation here is based on the description in Wikipedia [1]. It was first proposed by E. C. Pielou [2] and is similar to Heip’s evenness [3].
References
[1] | https://en.wikipedia.org/wiki/Species_evenness |
[2] | Pielou, E. C., 1966. The measurement of diversity in different types of biological collections. Journal of Theoretical Biology, 13, 131-44. |
[3] | Heip, C. 1974. A new index measuring evenness. J. Mar. Biol. Ass. UK., 54, 555-557. |