statsmodels.genmod.families.links.identity.inverse_deriv2¶
-
identity.
inverse_deriv2
(z)¶ Second derivative of the inverse of the power transform
- Parameters
z : array_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