statsmodels.genmod.families.links.CDFLink.deriv¶ CDFLink.deriv(p)[source]¶ Derivative of CDF link Parameters:¶ p : array_like¶mean parameters Returns:¶ g’(p) – The derivative of CDF transform at p Return type:¶ ndarray Notes g’(p) = 1./ dbn.pdf(dbn.ppf(p))