statsmodels.tsa.statespace.varmax.VARMAX.transform_params

VARMAX.transform_params(unconstrained) [source]

Transform unconstrained parameters used by the optimizer to constrained parameters used in likelihood evaluation

Parameters:	unconstrained (array_like) – Array of unconstrained parameters used by the optimizer, to be transformed.
Returns:	constrained – Array of constrained parameters which may be used in likelihood evalation.
Return type:	array_like

Notes

Constrains the factor transition to be stationary and variances to be positive.