statsmodels.genmod.families.links.CDFLink.inverse_deriv2

CDFLink.inverse_deriv2(z)[source]

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

Parameters:
zarray_like

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

Returns:
g^(-1)’’(z)ndarray

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

Notes

This method should be overwritten by subclasses.

The inherited method is implemented through numerical differentiation.


Last update: May 14, 2024