7.2.3.3.6.8. statsmodels.genmod.families.family.NegativeBinomial.weights¶

NegativeBinomial.weights(mu)¶

Weights for IRLS steps

Parameters:	mu : array-like The transformed mean response variable in the exponential family
Returns:	w : array The weights for the IRLS steps

Notes

w = 1 / (link’(mu)**2 * variance(mu))