statsmodels.discrete.count_model.ZeroInflatedPoisson.loglike

ZeroInflatedPoisson.loglike(params)

Loglikelihood of Generic Zero Inflated model

Parameters:params (array-like) – The parameters of the model. Returns:loglike – The log-likelihood function of the model evaluated at params. See notes. Return type:float

Notes

$$\ln L=\sum_{y_{i}=0}\ln(w_{i}+(1-w_{i})*P_{main\_model})+ \sum_{y_{i}>0}(\ln(1-w_{i})+L_{main\_model}) where P - pdf of main model, L - loglike function of main model.$$