contrib.blackjax.BlackjaxCustomKernel

Adapt an arbitrary BlackJAX sampler via a user-supplied build_fn.

Usage

Source

contrib.blackjax.BlackjaxCustomKernel(
    model=None,
    *,
    build_fn,
)

The escape hatch for kernels without a dedicated wrapper. build_fn receives (rng_key, logdensity_fn, position, num_warmup) and must return (inner_state, step_fn), where inner_state exposes .position over the same sites as the model and step_fn has signature (rng_key, inner_state) -> (inner_state, info). The base class validates the returned state’s key set and raises TypeError if it is malformed.

Parameters

model: ForecastModel | None = None

The NumPyro model to sample from.

build_fn: BlackjaxBuildFn

The blackjax build callable described above.