downdate_inverse_gamma_weibull

function downdate_inverse_gamma_weibull(x:Real, k:Real, α':Real, β':Real) -> (Real, Real)

Downdate the parameters of an inverse-gamma distribution with a Weibull likelihood with known shape.

  • x: The variate.
  • k: Likelihood shape.
  • α': Posterior shape.
  • β': Posterior scale.

Returns: the prior hyperparameters α and β.