statsmodels.tsa.statespace.dynamic_factor.DynamicFactor.transform_params¶

DynamicFactor.transform_params(unconstrained)[source]¶

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

Parameters:¶

unconstrainedarray_like

Array of unconstrained parameters used by the optimizer, to be transformed.

Returns:¶

constrainedarray_like

Array of constrained parameters which may be used in likelihood evaluation.

Notes

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