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:¶

params : array-like¶

The parameters of the model

Returns:¶

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

Return type:¶

ndarray, 1-D