statsmodels.discrete.count_model.ZeroInflatedPoisson.loglikeobs¶

ZeroInflatedPoisson.loglikeobs(params)¶

Loglikelihood for observations of Generic Zero Inflated model.

Parameters:¶

Returns:¶

loglikendarray: The log likelihood for each observation of the model evaluated at params. See Notes for definition.

Notes

\ln L = \ln (w_{i} + (1 - w_{i}) * P_{m a i n_m o d e l}) + \ln (1 - w_{i}) + L_{m a i n_m o d e l} w h e r e P - p d f o f m a i n m o d e l, L - l o g l i k e f u n c t i o n o f m a i n m o d e l .

for observations $i = 1, . . ., n$