skbio.diversity.alpha.
robbins
(counts)[source]¶Calculate Robbins’ estimator for the probability of unobserved outcomes.
State: Experimental as of 0.4.0.
Robbins’ estimator is defined as:
where \(F_1\) is the number of singleton OTUs.
Parameters: | counts : 1-D array_like, int
|
---|---|
Returns: | double
|
Notes
Robbins’ estimator is defined in [R9191]. The estimate computed here is for \(n-1\) counts, i.e. the x-axis is off by 1.
References
[R9191] | (1, 2) Robbins, H. E (1968). Ann. of Stats. Vol 36, pp. 256-257. |