Gamma.deviance()

statsmodels.genmod.families.family.Gamma.deviance

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

Gamma deviance function

Parameters:	endog : array-like Endogenous response variable mu : array-like Fitted mean response variable scale : float, optional An optional scale argument
Returns:	deviance : float Deviance function as defined below

Notes

deviance = 2*sum((endog - mu)/mu - log(endog/mu))