statsmodels.genmod.families.family.Family.starting_mu

Family.starting_mu(y)

Starting value for mu in the IRLS algorithm.

Parameters

yndarray

The untransformed response variable.

Returns

mu_0ndarray

The first guess on the transformed response variable.

Notes

$$\mu_0 = (Y + \overline{Y})/2$$

Only the Binomial family takes a different initial value.