# statsmodels.tsa.statespace.simulation_smoother.SimulationSmoother.extend¶

SimulationSmoother.extend(endog, start=None, end=None, **kwargs)

Extend the current state space model, or a specific (time) subset

Parameters
endogarray_like

An observed time-series process $$y$$.

startint, optional

The first period of a time-varying state space model to include in the new model. Has no effect if the state space model is time-invariant. Default is the initial period.

endint, optional

The last period of a time-varying state space model to include in the new model. Has no effect if the state space model is time-invariant. Default is the final period.

**kwargs

Keyword arguments to pass to the new state space representation model constructor. Those that are not specified are copied from the specification of the current state space model.

Returns
Representation

Notes

This method does not allow replacing a time-varying system matrix with a time-invariant one (or vice-versa). If that is required, use clone.