statsmodels.genmod.families.family.Family.loglike

Family.loglike(endog, mu, scale=1.0)

The loglikelihood function.

Parameters:

endog : array

Usually the endogenous response variable.

mu : array

Usually but not always the fitted mean response variable.

Returns:

llf : float

The value of the loglikelihood evaluated at (endog,mu).

Notes

This is defined for each family. endog and mu are not restricted to endog and mu respectively. For instance, the deviance function calls both loglike(endog, endog) and loglike(endog,mu) to get the likelihood ratio.