statsmodels.genmod.families.family.Gamma¶
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class
statsmodels.genmod.families.family.Gamma(link=<class 'statsmodels.genmod.families.links.inverse_power'>)[source]¶ Gamma exponential family distribution.
Parameters: link : a link instance, optional
The default link for the Gamma family is the inverse link. Available links are log, identity, and inverse. See statsmodels.family.links for more information.
Attributes
Gamma.link (a link instance) The link function of the Gamma instance Gamma.variance (varfunc instance) variance is an instance of statsmodels.family.varfuncs.mu_squared Methods
deviance(endog, mu[, scale])Gamma deviance function fitted(lin_pred)Fitted values based on linear predictors lin_pred. loglike(endog, mu[, scale])Loglikelihood function for Gamma exponential family distribution. predict(mu)Linear predictors based on given mu values. resid_anscombe(endog, mu)The Anscombe residuals for Gamma exponential family distribution resid_dev(endog, mu[, scale])Gamma deviance residuals starting_mu(y)Starting value for mu in the IRLS algorithm. weights(mu)Weights for IRLS steps