statsmodels.genmod.families.links.Link.inverse_deriv

Link.inverse_deriv(z)

Derivative of the inverse link function g^(-1)(z).

Parameters:

z : array-like

z is usually the linear predictor for a GLM or GEE model.

Returns:

The value of the derivative of the inverse of the link function

Notes

This reference implementation gives the correct result but it inefficient, so it can be overriden in subclasses.