update_lazy_gamma_poisson


function update_lazy_gamma_poisson(x:Expression<Integer>, k:Expression<Real>, θ:Expression<Real>) -> (Expression<Real>, Expression<Real>)

Update the parameters of a Gamma distribution with a Poisson likelihood.

  • x: The variate.
  • k: Prior shape.
  • θ: Prior scale.

Returns: the posterior hyperparameters k' and θ'.