statsmodels.base.model.GenericLikelihoodModel.expandparams¶

GenericLikelihoodModel.expandparams(params)[source]¶

expand to full parameter array when some parameters are fixed

Parameters:¶

paramsndarray

reduced parameter array

Returns:¶

paramsfullndarray

expanded parameter array where fixed parameters are included

Notes

Calling this requires that self.fixed_params and self.fixed_paramsmask are defined.

developer notes:

This can be used in the log-likelihood to …

this could also be replaced by a more general parameter transformation.