The loglikelihood function.
Parameters: | `endog` : array
`mu` : array
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Returns: | llf : float
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. : |