NegativeBinomial.deviance()

statsmodels.genmod.families.family.NegativeBinomial.deviance

NegativeBinomial.deviance(endog, mu, freq_weights=1.0, scale=1.0) [source]

Returns the value of the deviance function.

Parameters:	endog : array-like Endogenous response variable mu : array-like Fitted mean response variable freq_weights : array-like 1d array of frequency weights. The default is 1. scale : float, optional An optional scale argument. The default is 1.
Returns:	deviance : float Deviance function as defined below

Notes

where is defined as:

If :

If :