statsmodels.genmod.families.family.Poisson.loglike
-
Poisson.loglike(endog, mu, scale=1.0)
[source] -
Loglikelihood function for Poisson exponential family distribution.
Parameters: endog : array-like
Endogenous response variable
mu : array-like
Fitted mean response variable
scale : float, optional
The default is 1.
Returns: llf : float
The value of the loglikelihood function evaluated at (endog,mu,scale) as defined below.
Notes
llf = scale * sum(-mu + endog*log(mu) - gammaln(endog+1)) where gammaln is the log gamma function
Please login to continue.