Gamma deviance function
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.
deviance : float
Deviance function as defined below
Notes
D = 2 * \sum_i freq\_weights_i * ((Y_i - \mu_i)/\mu_i - \log(Y_i / \mu_i))
statsmodels.genmod.families.family.Gamma.weights
statsmodels.genmod.families.family.Gamma.fitted
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