statsmodels.genmod.families.links.NegativeBinomial.inverse_deriv¶
- NegativeBinomial.inverse_deriv(z)[source]¶
Derivative of the inverse of the negative binomial transform
- Parameters:
- zarray_like
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 negative binomial link
- g^(-1)’(z)