logpdf_lazy_beta_binomial
function logpdf_lazy_beta_binomial(x:Expression<Integer>, n:Expression<Integer>, α:Expression<Real>, β:Expression<Real>) -> Expression<Real>
Observe a beta-binomial variate.
- x: The variate.
- n: Number of trials.
- α: Shape.
- β: Shape.
Returns: the log probability mass.