statsmodels.discrete.discrete_model.NegativeBinomialP.score_factor¶

NegativeBinomialP.score_factor(params, endog=None)[source]¶

Generalized Negative Binomial (NB-P) model score (gradient) vector of the log-likelihood for each observations.

Parameters:¶

paramsarray_like

The parameters of the model

Returns:¶

scorendarray, 1-D

The score vector of the model, i.e. the first derivative of the loglikelihood function, evaluated at params