ScaleInverseGamma

ScaleInverseGamma#

class liesel_ptm.ScaleInverseGamma(value, concentration, scale, name='', inference=None, bijector=None, role='hyperparam')[source]#

Bases: Var

A variable with an Inverse Gamma prior on its square.

Parameters:

  • value (Any) – Initial value of the variable.

  • concentration (float | Var | Node) – Concentration parameter of the inverse gamma distribution. In some parameterizations, this parameter is called a.

  • scale (float | Var | Node) – Scale parameter of the inverse gamma distribution. In some parameterizations, this parameter is called b.

  • name (str) – Name of the variable. (default: '')

  • inference (Any) – Inference type. (default: None)

  • bijector (Bijector | None) – A tensorflow bijector instance. If a bijector is supplied, the variable will be transformed using the bijector. This renders the variable itself weak, meaning that it is a deterministic function of the newly created transformed variable. The prior is transferred to this transformed variable and transformed according to the change-of-variables theorem. (default: None)

variance_param#

The internal variance parameter (square of the reported scale). This is an lsl.Var created as the latent variance parameter.

bijector#

The bijector passed to the constructor (or None). When present, the bijector was applied to the variance parameter and the public variable becomes a deterministic transform of that parameter.

Methods

Attributes

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