esquilax.sim_runner

esquilax.sim_runner(step_fun: Callable, params: Any, initial_state: chex.ArrayTree, n_steps: int, rng: chex.PRNGKey | int, show_progress: bool = True, **static_kwargs) → Tuple[Any, Any, chex.PRNGKey]

Run a simulation and track state

Repeated applies a provided simulation update function and records simulation state over the course of execution.

Parameters:

• step_fun (Callable) –

  Update function that should have the signature

  def step(i, k, params, state, **static_kwargs):
      ...
      return new_state, records
  

  where the arguments are

  • i: The current step number

  • k: A JAX random key

  • params: Sim parameters

  • state: The current simulation state

  • **static_kwargs: Static keyword arguments

  and returns

  • new_state: Updated simulation state

  • records: State data to be recorded

• params – Simulation parameters. Parameters are constant over the course of the simulation.

• initial_state – Initial simulation state.

• n_steps – Number of steps to run.

• rng – Either an integer random seed, or a JAX PRNGKey.

• show_progress – If True a progress bar will be shown.

• **static_kwargs – Any keyword static values passed to the step function. These should be used for any values or functionality required to be known at compile time by JAX.

Returns:

Tuple containing

• The final state of the simulation

• Recorded values

• Update random key

Return type:

[Any, Any, chex.PRNGKey]