update_scaled_gamma_poisson

function update_scaled_gamma_poisson(x:Integer, a:Real, k:Real, θ:Real) -> (Real, Real)

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

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

Returns: the posterior hyperparameters k' and θ'.