statsmodels.genmod.families.links.inverse_squared.inverse_deriv2¶
-
inverse_squared.
inverse_deriv2
(z)¶ Second derivative of the inverse of the power transform
- Parameters
- zarray_like
z is usually the linear predictor for a GLM or GEE model.
- Returns
- g^(-1)’(z)
ndarray
The value of the derivative of the inverse of the power transform
function
- g^(-1)’(z)