statsmodels.genmod.families.links.Probit.inverse_deriv2#
- Probit.inverse_deriv2(z)[source]#
Second derivative of the inverse link function
- 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 probit link function
- g^(-1)’’(z)
Notes
This is the derivative of the pdf in a CDFLink