This function computes the Pois prior proposed in Du, Kao and Kou (2015), which is used under the Poisson assumption with conjugate prior. The data is assumed to follow Poisson(λ), where λ is assumed to have Beta prior with shape parameters α and β.
Observed data in vector form where each element represents a single observation.
See Manual.pdf in "data" folder.
Vector for prior parameters in the order of (α, β)
Chao Du, Chu-Lan Michael Kao and S. C. Kou (2015), "Stepwise Signal Extraction via Marginal Likelihood". Forthcoming in Journal of American Statistical Association.
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