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Description
This issue is a feature proposal.
Yule-Simon distribution is a one-parameter discrete distribution, often used to model power-law distributed count data. It is a "better to use in practice" version of Zipf/Zeta distribution, which we wanted many years ago (#28). Yule-simon is very stable and super fast compared with evaluating Riemann zeta function.
PMF
Expected Output
real yule_simon_lpmf(ints n, reals alpha)
Checklist
This will require ayule_simon_lpmf
with analytical derivatives.
-
_lpmf
- test of
_lpmf
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